Imperial College London

Professor Sir Tejinder Singh Virdee FRS

Faculty of Natural SciencesDepartment of Physics

Professor of Physics
 
 
 
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Contact

 

+44 (0)20 7594 7590t.virdee Website

 
 
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Location

 

506Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

991 results found

Sirunyan AM, Tumasyan A, Adam W, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Eroe J, Flechl M, Friedl M, Fruehwirth R, Ghete VM, Hartl C, Hoermann N, Hrubec J, Jeitler M, Koenig A, Kraetschmer I, Liko D, Matsushita T, Mikulec I, Rabady D, Rad N, Rahbaran B, Rohringer H, Schieck J, Strauss J, Waltenberger W, Wulz C-E, Chekhovsky V, Dvornikov O, Dydyshka Y, Emeliantchik I, Litomin A, Makarenko V, Mossolov V, Stefanovitch R, Gonzalez JS, Zykunov V, Shumeiko N, Alderweireldt S, De Wolf EA, Janssen X, Lauwers J, De Klundert MV, Van Haevermaet H, Van Mechelen P, Van Remortel N, Van Spilbeeck A, Abu Zeid S, Blekman F, D'Hondt J, Daci N, De Bruyn I, Deroover K, Lowette S, Moortgat S, Moreels L, Olbrechts A, Python Q, Skovpen K, Tavernier S, Van Doninck W, Van Mulders P, Van Parijs I, Brun H, Clerbaux B, De Lentdecker G, Delannoy H, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Karapostoli G, Lenzi T, Leonard A, Luetic J, Maerschalk T, Marinov A, Randle-conde A, Seva T, Vander Velde C, Vanlaer P, Vannerom D, Yonamine R, Zenoni F, Zhang F, Cimmino A, Cornelis T, Dobur D, Fagot A, Gul M, Khvastunov I, Poyraz D, Salva S, Schofbeck R, Tytgat M, Van Driessche W, Yazgan E, Zaganidis N, Bakhshiansohi H, Beluffi C, Bondu O, Brochet S, Bruno G, Caudron A, De Visscher S, Delaere C, Delcourt M, Francois B, Giammanco A, Jafari A, Komm M, Krintiras G, Lemaitre V, Magitteri A, Mertens A, Musich M, Nuttens C, Piotrzkowski K, Quertenmont L, Selvaggi M, Marono MV, Wertz S, Beliy N, Alda Junior WL, Alves FL, Alves GA, Brito L, Hensel C, Moraes A, Pol ME, Rebello Teles P, Belchior Batista Das Chagas E, Carvalho W, Chinellato J, Custodio A, Da Costa EM, Da Silveira GG, De Jesus Damiao D, De Oliveira Martins C, Fonseca De Souza S, Huertas Guativa LM, Malbouisson H, Matos Figueiredo D, Mora Herrera C, Mundim L, Nogima H, Prado Da Silva WL, Santoro A, Sznajder A, Tonelli Manganote EJ, Vilela Pereira A, Ahuja S, Bernardes CA, Dogra S, Fernandez Perez Tomei TR, Gregores EMet al., 2017, Measurement of the t(t)over-bar production cross section using events with one lepton and at least one jet in pp collisions at root s=13 TeV, JOURNAL OF HIGH ENERGY PHYSICS, Vol: 2017, ISSN: 1029-8479

A measurement of the tt¯ production cross section at s√=13 TeV is presented using proton-proton collisions, corresponding to an integrated luminosity of 2.2 fb−1, collected with the CMS detector at the LHC. Final states with one isolated charged lepton (electron or muon) and at least one jet are selected and categorized according to the accompanying jet multiplicity. From a likelihood fit to the invariant mass distribution of the isolated lepton and a jet identified as coming from the hadronization of a bottom quark, the cross section is measured to be σtt¯=888±2,(stat)+26−28(syst)±20(lumi) pb, in agreement with the standard model prediction. Using the expected dependence of the cross section on the pole mass of the top quark (mt), the value of mt is found to be 170.6 ± 2.7 GeV.

Journal article

Sirunyan AM, Tumasyan A, Adam W, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Eroe J, Flechl M, Friedl M, Fruehwirth R, Ghete VM, Hartl C, Hoermann N, Hrubec J, Jeitler M, Koenig A, Kraetschmer I, Liko D, Matsushita T, Mikulec I, Rabady D, Rad N, Rahbaran B, Rohringer H, Schieck J, Strauss J, Waltenberger W, Wulz C-E, Dvornikov O, Makarenko V, Mossolov V, Gonzalez JS, Zykunov V, Shumeiko N, Alderweireldt S, De Wolf EA, Janssen X, Lauwers J, Van De Klundert M, Van Haevermaet H, Van Mechelen P, Van Remortel N, Van Spilbeeck A, Abu Zeid S, Blekman F, D'Hondt J, Daci N, De Bruyn I, Deroover K, Lowette S, Moortgat S, Moreels L, Olbrechts A, Python Q, Skovpen K, Tavernier S, Van Doninck W, Van Mulders P, Van Parijs I, Brun H, Clerbaux B, De Lentdecker G, Delannoy H, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Karapostoli G, Lenzi T, Leonard A, Luetic J, Maerschalk T, Marinov A, Randle-conde A, Seva T, Vander Velde C, Vanlaer P, Vannerom D, Yonamine R, Zenoni F, Zhang F, Cimmino A, Cornelis T, Dobur D, Fagot A, Gul M, Khvastunov I, Poyraz D, Salva S, Schofbeck R, Tytgat M, Van Driessche W, Yazgan E, Zaganidis N, Bakhshiansohi H, Beluffi C, Bondu O, Brochet S, Bruno G, Caudron A, De Visscher S, Delaere C, Delcourt M, Francois B, Giammanco A, Jafari A, Komm M, Krintiras G, Lemaitre V, Magitteri A, Mertens A, Musich M, Piotrzkowski K, Quertenmont L, Selvaggi M, Marono MV, Wertz S, Beliy N, Alda Junior WL, Alves FL, Alves GA, Brito L, Hensel C, Moraes A, Pol ME, Rebello Teles P, Belchior Batista Das Chagas E, Carvalho W, Chinellato J, Custodio A, Da Costa EM, Da Silveira GG, De Jesus Damiao D, De Oliveira Martins C, Fonseca De Souza S, Huertas Guativa LM, Malbouisson H, Matos Figueiredo D, Mora Herrera C, Mundim L, Nogima H, Prado Da Silva WL, Santoro A, Sznajder A, Tonelli Manganote EJ, Torres Da Silva De Araujo F, Vilela Pereira A, Ahuja S, Bernardes CA, Dogra S, Fernandez Perez Tomei TR, Gregores EM, Mercadante PC, Moon CS, Novaes SF, Padula SS, Roet al., 2017, Search for a heavy resonance decaying to a top quark and a vector-like top quark at root s=13 TeV, JOURNAL OF HIGH ENERGY PHYSICS, Vol: 2017, ISSN: 1029-8479

A search is presented for massive spin-1 Z′ resonances decaying to a top quark and a heavy vector-like top quark partner T. The search is based on a 2.6 fb−1 sample of proton-proton collisions at 13 TeV collected with the CMS detector at the LHC. The analysis is optimized for final states in which the T quark decays to a W boson and a bottom quark. The focus is on all-jet final states in which both the W boson and the top quark decay into quarks that evolve into jets. The decay products of the top quark and of the W boson are assumed to be highly Lorentz-boosted and cannot be reconstructed as separate jets, but are instead reconstructed as merged, wide jets. Techniques for the identification of jet substructure and jet flavour are used to distinguish signal from background events. Several models for Z′ bosons decaying to T quarks are excluded at 95% confidence level, with upper limits on the cross section ranging from 0.13 to 10 pb, depending on the chosen hypotheses. This is the first search for a neutral spin-1 heavy resonance decaying to a top quark and a vector-like T quark in the all-hadronic final state.

Journal article

Sirunyan AM, Tumasyan A, Adam W, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Erö J, Flechl M, Friedl M, Frühwirth R, Ghete VM, Hartl C, Hörmann N, Hrubec J, Jeitler M, König A, Krätschmer I, Liko D, Matsushita T, Mikulec I, Rabady D, Rad N, Rahbaran B, Rohringer H, Schieck J, Strauss J, Waltenberger W, Wulz C-E, Dvornikov O, Makarenko V, Mossolov V, Suarez Gonzalez J, Zykunov V, Shumeiko N, Alderweireldt S, De Wolf EA, Janssen X, Lauwers J, Van De Klundert M, Van Haevermaet H, Van Mechelen P, Van Remortel N, Van Spilbeeck A, Abu Zeid S, Blekman F, D'Hondt J, Daci N, De Bruyn I, Deroover K, Lowette S, Moortgat S, Moreels L, Olbrechts A, Python Q, Skovpen K, Tavernier S, Van Doninck W, Van Mulders P, Van Parijs I, Brun H, Clerbaux B, De Lentdecker G, Delannoy H, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Karapostoli G, Lenzi T, Léonard A, Luetic J, Maerschalk T, Marinov A, Randle-conde A, Seva T, Vander Velde C, Vanlaer P, Vannerom D, Yonamine R, Zenoni F, Zhang F, Cimmino A, Cornelis T, Dobur D, Fagot A, Gul M, Khvastunov I, Poyraz D, Salva S, Schöfbeck R, Tytgat M, Van Driessche W, Yazgan E, Zaganidis N, Bakhshiansohi H, Beluffi C, Bondu O, Brochet S, Bruno G, Caudron A, De Visscher S, Delaere C, Delcourt M, Francois B, Giammanco A, Jafari A, Komm M, Krintiras G, Lemaitre V, Magitteri A, Mertens A, Musich M, Piotrzkowski K, Quertenmont L, Selvaggi M, Vidal Marono M, Wertz S, Beliy N, Aldá Júnior WL, Alves FL, Alves GA, Brito L, Hensel C, Moraes A, Pol ME, Rebello Teles P, Belchior Batista Das Chagas E, Carvalho W, Chinellato J, Custódio A, Da Costa EM, Da Silveira GG, De Jesus Damiao D, De Oliveira Martins C, Fonseca De Souza S, Huertas Guativa LM, Malbouisson H, Matos Figueiredo D, Mora Herrera C, Mundim L, Nogima H, Prado Da Silva WL, Santoro A, Sznajder A, Tonelli Manganote EJ, Torres Da Silva De Araujo F, Vilela Pereira A, Ahuja S, Bernardes CA, Dogra S, Fernandez Perez Tomei TR, Gregores EM, Mercadante PG, Moon CS, Novaes SF, Padulaet al., 2017, Search for anomalous couplings in boosted WW/WZ→ℓνqq‾ production in proton–proton collisions at s=8 TeV, Physics Letters B, Vol: 772, Pages: 21-42, ISSN: 0370-2693

This Letter presents a search for new physics manifested as anomalous triple gauge boson couplings in WW and WZ diboson production in proton–proton collisions. The search is performed using events containing a W boson that decays leptonically and a W or Z boson whose decay products are merged into a single reconstructed jet. The data, collected at s=8 TeV with the CMS detector at the LHC, correspond to an integrated luminosity of 19 fb−1. No evidence for anomalous triple gauge couplings is found and the following 95% confidence level limits are set on their values: λ ([−0.011,0.011]), Δκγ ([−0.044,0.063]), and Δg1Z ([−0.0087,0.024]). These limits are also translated into their effective field theory equivalents: cWWW/Λ2 ([−2.7,2.7] TeV−2), cB/Λ2 ([−14,17] TeV−2), and cW/Λ2 ([−2.0,5.7] TeV−2).

Journal article

Khachatryan V, Sirunyan AM, Tumasyan A, Adam W, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Eroe J, Flechl M, Friedl M, Fruehwirth R, Ghete VM, Hartl C, Hoermann N, Hrubec J, Jeitler M, Koenig A, Kraetschmer I, Liko D, Matsushita T, Mikulec I, Rabady D, Rad N, Rahbaran B, Rohringer H, Schieck J, Strauss J, Treberer-Treberspurg W, Waltenberger W, Wulz C-E, Mossolov V, Shumeiko N, Gonzalez JS, Alderweireldt S, De Wolf EA, Janssen X, Lauwers J, Van de Klundert M, Van Haevermaet H, Van Mechelen P, Van Remortel N, Van Spilbeeck A, Abu Zeid S, Blekman F, D'Hondt J, Daci N, De Bruyn I, Deroover K, Heracleous N, Lowette S, Moortgat S, Moreels L, Olbrechts A, Python Q, Tavernier S, Van Doninck W, Van Mulders P, Van Parijs I, Brun H, Caillol C, Clerbaux B, De Lentdecker G, Delannoy H, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Karapostoli G, Lenzi T, Leonard A, Luetic J, Maerschalk T, Marinov A, Randle-Conde A, Seva T, Vander Velde C, Vanlaer P, Yonamine R, Zenoni F, Zhang F, Cimmino A, Cornelis T, Dobur D, Fagot A, Garcia G, Gul M, Poyraz D, Salva S, Schofbeck R, Sharma A, Tytgat M, Van Driessche W, Yazgan E, Zaganidis N, Bakhshiansohi H, Beluffi C, Bondu O, Brochet S, Bruno G, Caudron A, De Visscher S, Delaere C, Delcourt M, Francois B, Giammanco A, Jafari A, Jez P, Komm M, Lemaitre V, Magitteri A, Mertens A, Musich M, Nuttens C, Piotrzkowski K, Quertenmont L, Selvaggi M, Marono MV, Wertz S, Beliy N, Alda Junior WL, Alves FL, Alves GA, Brito L, Hensel C, Moraes A, Pol ME, Rebello Teles P, Belchior Batista Das Chagas E, Carvalho W, Chinellato J, Custodio A, Da Costa EM, Da Silveira GG, De Jesus Damiao D, De Oliveira Martins C, Fonseca De Souza S, Huertas Guativa LM, Malbouisson H, Matos Figueiredo D, Mora Herrera C, Mundim L, Nogima H, Prado Da Silva WL, Santoro A, Sznajder A, Tonelli Manganote EJ, Vilela Pereira A, Ahuja S, Bernardes CA, Dogra S, Fernandez Perez Tomei TR, Gregores EM, Mercadante PG, Moon CS, Novaes SF, Padula SS, Romero Abad D Ret al., 2017, Search for leptophobic Z ' bosons decaying into four-lepton final states in proton-proton collisions at root s=8 TeV, PHYSICS LETTERS B, Vol: 773, Pages: 563-584, ISSN: 0370-2693

A search for heavy narrow resonances decaying into four-lepton final states has been performed using proton–proton collision data at collected by the CMS experiment, corresponding to an integrated luminosity of 19.7. No excess of events over the standard model background expectation is observed. Upper limits for a benchmark model on the product of cross section and branching fraction for the production of these heavy narrow resonances are presented. The limit excludes leptophobic bosons with masses below 2.5 within the benchmark model. This is the first result to constrain a leptophobic resonance in the four-lepton channel.

Journal article

Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Eroe J, Flechl M, Friedl M, Fruehwirth R, Ghete VM, Grossmann J, Hrubec J, Jeitler M, Koenig A, Krammer N, Kraetschmer I, Liko D, Madlener T, Mikulec I, Pree E, Rabady D, Rad N, Rohringer H, Schieck J, Schoefbeck R, Spanring M, Spitzbart D, Strauss J, Waltenberger W, Wittmann J, Wulz C-E, Zarucki M, Chekhovsky V, Mossolov V, Gonzalez JS, De Wolf EA, Di Croce D, Janssen X, Lauwers J, Van De Klundert M, Van Haevermaet H, Van Mechelen P, Van Remortel N, Van Spilbeeck A, Abu Zeid S, Blekman F, D'Hondt J, De Bruyn I, De Clercq J, Deroover K, Flouris G, Lontkovskyi D, Lowette S, Moortgat S, Moreels L, Olbrechts A, Python Q, Skovpen K, Tavernier S, Van Doninck W, Van Mulders P, Van Parijs I, Brun H, Clerbaux B, De Lentdecker G, Delannoy H, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Karapostoli G, Lenzi T, Luetic J, Maerschalk T, Marinov A, Randle-conde A, Seva T, Vander Velde C, Vanlaer P, Vannerom D, Yonamine R, Zenoni F, Zhang F, Cimmino A, Cornelis T, Dobur D, Fagot A, Gul M, Khvastunov I, Poyraz D, Roskas C, Salva S, Tytgat M, Verbeke W, Zaganidis N, Bakhshiansohi H, Bondu O, Brochet S, Bruno G, Caudron A, De Visscher S, Delaere C, Delcourt M, Francois B, Giammanco A, Jafari A, Komm M, Krintiras G, Lemaitre V, Magitteri A, Mertens A, Musich M, Piotrzkowski K, Quertenmont L, Marono MV, Wertz S, Beliy N, Alda Junior WL, Alves FL, Alves GA, Brito L, Correa Martins Junior M, Hensel C, Moraes A, Pol ME, Rebello Teles P, Belchior Batista Das Chagas E, Carvalho W, Chinellato J, Custodio A, Da Costa EM, Da Silveira GG, De Jesus Damiao D, Fonseca De Souza S, Huertas Guativa LM, Malbouisson H, Melo De Almeida M, Mora Herrera C, Mundim L, Nogima H, Santoro A, Sznajder A, Tonelli Manganote EJ, Torres Da E Silva De Araujo F, Vilela Pereira A, Ahuja S, Bernardes CA, Fernandez Perez Tomei TR, Gregores EM, Mercadante PG, Moon CS, Novaes SF, Padula SS, Romero Abad D, Ruizet al., 2017, Search for physics beyond the standard model in events with two leptons of same sign, missing transverse momentum, and jets in proton-proton collisions at root s=13TeV, EUROPEAN PHYSICAL JOURNAL C, Vol: 77, ISSN: 1434-6044

A data sample of events from proton–proton collisions with two isolated same-sign leptons, missing transverse momentum, and jets is studied in a search for signatures of new physics phenomena by the CMS Collaboration at the LHC. The data correspond to an integrated luminosity of 35.9fb−1, and a center-of-mass energy of 13TeV. The properties of the events are consistent with expectations from standard model processes, and no excess yield is observed. Exclusion limits at 95% confidence level are set on cross sections for the pair production of gluinos, squarks, and same-sign top quarks, as well as top-quark associated production of a heavy scalar or pseudoscalar boson decaying to top quarks, and on the standard model production of events with four top quarks. The observed lower mass limits are as high as 1500GeV for gluinos, 830GeV for bottom squarks. The excluded mass range for heavy (pseudo)scalar bosons is 350–360 (350–410)GeV. Additionally, model-independent limits in several topological regions are provided, allowing for further interpretations of the results.

Journal article

Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Eroe J, Flechl M, Friedl M, Fruehwirth R, Ghete VM, Grossmann J, Hrubec J, Jeitler M, Koenig A, Krammer N, Kraetschmer I, Liko D, Madlener T, Mikulec I, Pree E, Rabady D, Rad N, Rohringer H, Schieck J, Schoefbeck R, Spanring M, Spitzbart D, Strauss J, Waltenberger W, Wittmann J, Wulz C-E, Zarucki M, Chekhovsky V, Mossolov V, Gonzalez JS, De Wolf EA, Di Croce D, Janssen X, Lauwers J, De Klundert MV, Van Haevermaet H, Van Mechelen P, Van Remortel N, Van Spilbeeck A, Abu Zeid S, Blekman F, D'Hondt J, De Bruyn I, De Clercq J, Deroover K, Flouris G, Lontkovskyi D, Lowette S, Moortgat S, Moreels L, Olbrechts A, Python Q, Skovpen K, Tavernier S, Van Doninck W, Van Mulders P, Van Parijs I, Brun H, Clerbaux B, De Lentdecker G, Delannoy H, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Karapostoli G, Lenzi T, Luetic J, Maerschalk T, Marinov A, Randle-conde A, Seva T, Vander Velde C, Vanlaer P, Vannerom D, Yonamine R, Zenoni F, Zhang F, Cimmino A, Cornelis T, Dobur D, Fagot A, Gul M, Khvastunov I, Poyraz D, Roskas C, Salva S, Tytgat M, Verbeke W, Zaganidis N, Bakhshiansohi H, Bondu O, Brochet S, Bruno G, Caudron A, De Visscher S, Delaere C, Delcourt M, Francois B, Giammanco A, Jafari A, Komm M, Krintiras G, Lemaitre V, Magitteri A, Mertens A, Musich M, Piotrzkowski K, Quertenmont L, Marono MV, Wertz S, Beliy N, Alda Junior WL, Alves FL, Alves GA, Brito L, Correa Martins Junior M, Hensel C, Moraes A, Pol ME, Rebello Teles P, Belchior Batista Das Chagas E, Carvalho W, Chinellato J, Custodio A, Da Costa EM, Da Silveira GG, De Jesus Damiao D, Fonseca De Souza S, Huertas Guativa LM, Malbouisson H, Melo De Almeida M, Mora Herrera C, Mundim L, Nogima H, Santoro A, Sznajder A, Tonelli Manganote EJ, Torres Da Silva De Araujo F, Vilela Pereira A, Ahuja S, Bernardes CA, Fernandez Perez Tomei TR, Gregores EM, Mercadante PG, Moon CS, Novaes SF, Padula SS, Romero Abad D, Ruiz Varget al., 2017, Search for supersymmetry in multijet events with missing transverse momentum in proton-proton collisions at 13 TeV, Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol: 96, ISSN: 1550-2368

A search for supersymmetry is presented based on multijet events with large missing transversemomentum produced in proton-proton collisions at a center-of-mass energy of ffiffis p ¼ 13 TeV. The data,corresponding to an integrated luminosity of 35.9 fb−1, were collected with the CMS detector at the CERNLHC in 2016. The analysis utilizes four-dimensional exclusive search regions defined in terms of thenumber of jets, the number of tagged bottom quark jets, the scalar sum of jet transverse momenta, and themagnitude of the vector sum of jet transverse momenta. No evidence for a significant excess of events isobserved relative to the expectation from the standard model. Limits on the cross sections for the pairproduction of gluinos and squarks are derived in the context of simplified models. Assuming the lightestsupersymmetric particle to be a weakly interacting neutralino, 95% confidence level lower limits on thegluino mass as large as 1800 to 1960 GeV are derived, and on the squark mass as large as 960 to 1390 GeV,depending on the production and decay scenario.

Journal article

Sirunyan AM, Tumasyan A, Adam W, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Eroe J, Flechl M, Friedl M, Fruehwirth R, Ghete VM, Hartl C, Hoermann N, Hrubec J, Jeitler M, Koenig A, Kraetschmer I, Liko D, Matsushita T, Mikulec I, Rabady D, Rad N, Rahbaran B, Rohringer H, Schieck J, Strauss J, Waltenberger W, Wulz C-E, Chekhovsky V, Dvornikov O, Dydyshka Y, Emeliantchik I, Litomin A, Makarenko V, Mossolov V, Stefanovitch R, Gonzalez JS, Zykunov V, Shumeiko N, Alderweireldt S, De Wolf EA, Janssen X, Lauwers J, De Klundert MV, Van Haevermaet H, Van Mechelen P, Van Remortel N, Van Spilbeeck A, Abu Zeid S, Blekman F, D'Hondt J, Daci N, De Bruyn I, Deroover K, Lowette S, Moortgat S, Moreels L, Olbrechts A, Python Q, Skovpen K, Tavernier S, Van Doninck W, Van Mulders P, Van Parijs I, Brun H, Clerbaux B, De Lentdecker G, Delannoy H, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Karapostoli G, Lenzi T, Leonard A, Luetic J, Maerschalk T, Marinov A, Randle-Conde A, Seva T, Velde CV, Vanlaer P, Vannerom D, Yonamine R, Zenoni F, Zhang F, Cimmino A, Cornelis T, Dobur D, Fagot A, Gul M, Khvastunov I, Poyraz D, Salva S, Schofbeck R, Tytgat M, Van Driessche W, Yazgan E, Zaganidis N, Bakhshiansohi H, Beluffi C, Bondu O, Brochet S, Bruno G, Caudron A, De Visscher S, Delaere C, Delcourt M, Francois B, Giammanco A, Jafari A, Komm M, Krintiras G, Lemaitre V, Magitteri A, Mertens A, Musich M, Nuttens C, Piotrzkowski K, Quertenmont L, Selvaggi M, Marono MV, Wertz S, Beliy N, Alda Junior WL, Alves FL, Alves GA, Brito L, Hensel C, Moraes A, Pol ME, Rebello Teles P, Das Chagas EBB, Carvalho W, Chinellato J, Custodio A, Da Costa EM, Da Silveira GG, De Jesus Damiao D, De Oliveira Martins C, Fonseca De Souza S, Huertas Guativa LM, Malbouisson H, Matos Figueiredo D, Mora Herrera C, Mundim L, Nogima H, Prado Da Silva WL, Santoro A, Sznajder A, Tonelli Manganote EJ, Vilela Pereira A, Ahuja S, Bernardes CA, Dogra S, Tomei TRFP, Gregores EM, Mercadante PG, Moon CS, Novaes SFet al., 2017, Study of Jet Quenching with Z plus jet Correlations in Pb-Pb and pp Collisions at root s(NN)=5.02 TeV, Physical Review Letters, Vol: 119, ISSN: 0031-9007

The production of jets in association with Z bosons, reconstructed via the μþμ− and eþe− decaychannels, is studied in pp and, for the first time, in Pb-Pb collisions. Both data samples were collected bythe CMS experiment at the LHC, at a nucleon-nucleon center-of-mass energy of 5.02 TeV. The Pb-Pbcollisions were analyzed in the 0%–30% centrality range. The back-to-back azimuthal alignment wasstudied in both pp and Pb-Pb collisions for Z bosons with transverse momentum pZT > 60 GeV=c and arecoiling jet with pjetT > 30 GeV=c. The pT imbalance xjZ ¼ pjetT =pZT, as well as the average number of jetpartners per Z, RjZ, was studied in intervals of pZT. The RjZ is found to be smaller in Pb-Pb than in ppcollisions, which suggests that in Pb-Pb collisions a larger fraction of partons associated with the Z bosonsfall below the 30 GeV=c pjetT threshold because they lose energy.

Journal article

Sirunyan AM, Sirunyan AM, Tumasyan A, Adam W, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Eroe J, Flechl M, Friedl M, Fruehwirth R, Ghete VM, Hartl C, Hoermann N, Hrubec J, Jeitler M, Koenig A, Kraetschmer I, Liko D, Matsushita T, Mikulec I, Rabady D, Rad N, Rahbaran B, Rohringer H, Schieck J, Strauss J, Waltenberger W, Wulz C-E, Dvornikov O, Makarenko V, Mossolov V, Gonzalez JS, Zykunov V, Shumeiko N, Alderweireldt S, De Wolf EA, Janssen X, Lauwers J, De Klundert MV, Van Haevermaet H, Van Mechelen P, Van Remortel N, Van Spilbeeck A, Abu Zeid S, Blekman F, D'Hondt J, Daci N, De Bruyn I, Deroover K, Lowette S, Moortgat S, Moreels L, Olbrechts A, Python Q, Skovpen K, Tavernier S, Van Doninck W, Van Mulders P, Van Parijs I, Brun H, Clerbaux B, De Lentdecker G, Delannoy H, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Karapostoli G, Lenzi T, Leonard A, Luetic J, Maerschalk T, Marinov A, Randle-conde A, Seva T, Vander Velde C, Vanlaer P, Vannerom D, Yonamine R, Zenoni F, Zhang F, Cornelis T, Dobur D, Fagot A, Gul M, Khvastunov I, Poyraz D, Salva S, Schofbeck R, Tytgat M, Van Driessche W, Yazgan E, Zaganidis N, Bakhshiansohi H, Bondu O, Brochet S, Bruno G, Caudron A, De Visscher S, Delaere C, Delcourt M, Francois B, Giammanco A, Jafari A, Komm M, Krintiras G, Lemaitre V, Magitteri A, Mertens A, Musich M, Piotrzkowski K, Quertenmont L, Selvaggi M, Marono MV, Wertz S, Beliy N, Alda Junior WL, Alves FL, Alves GA, Brito L, Hensel C, Moraes A, Pol ME, Rebello Teles P, Belchior Batista Das Chagas E, Carvalho W, Chinellato J, Custodio A, Da Costa EM, Da Silveira GG, De Jesus Damiao D, De Oliveira Martins C, Fonseca De Souza S, Huertas Guativa LM, Malbouisson H, Matos Figueiredo D, Mora Herrera C, Mundim L, Nogima H, Prado Da Silva WL, Santoro A, Sznajder A, Tonelli Manganote EJ, Torres Da Silva De Araujo F, Vilela Pereira A, Ahuja S, Bernardes CA, Dogra S, Fernandez Perez Tomei TR, Gregores EM, Mercadante PG, Moon CS, Novaes SF, Padula SS, Romero Abad Det al., 2017, Measurement of the top quark mass in the dileptonic t(t)over-bar decay channel using the mass observables M-bl, M-T2, and M-blv in pp collisions at root=8 TeV, Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol: 96, ISSN: 1550-2368

A measurement of the top quark mass (Mt) in the dileptonic t¯t decay channel is performed using datafrom proton-proton collisions at a center-of-mass energy of 8 TeV. The data was recorded by the CMSexperiment at the LHC and corresponds to an integrated luminosity of 19.7 0.5 fb−1. Events are selectedwith two oppositely charged leptons (l ¼ e, μ) and two jets identified as originating from b quarks. Theanalysis is based on three kinematic observables whose distributions are sensitive to the value of Mt.An invariant mass observable, Mbl, and a “stransverse mass” observable, MT2, are employed in asimultaneous fit to determine the value of Mt and an overall jet energy scale factor (JSF). A complementaryapproach is used to construct an invariant mass observable, Mblν, that is combined with MT2 to measureMt. The shapes of the observables, along with their evolutions in Mt and JSF, are modeled by anonparametric Gaussian process regression technique. The sensitivity of the observables to the value of Mtis investigated using a Fisher information density method. The top quark mass is measured to be172.22 0.18ðstatÞ þ0.89 −0.93 ðsystÞ GeV.

Journal article

Sirunyan AM, Tumasyan A, Adam W, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Eroe J, Flechl M, Friedl M, Fruehwirth R, Ghete VM, Hartl C, Hoermann N, Hrubec J, Jeitler M, Koenig A, Kraetschmer I, Liko D, Matsushita T, Mikulec I, Rabady D, Rad N, Rahbaran B, Rohringer H, Schieck J, Strauss J, Waltenberger W, Wulz C-E, Chekhovsky V, Mossolov V, Gonzalez JS, Shumeiko N, Alderweireldt S, De Wolf EA, Janssen X, Lauwers J, Van de Klundert M, Van Haevermaet H, Van Mechelen P, Van Remortel N, Van Spilbeeck A, Abu Zeid S, Blekman F, D'Hondt J, De Bruyn I, De Clercq J, Deroover K, Lowette S, Moortgat S, Moreels L, Olbrechts A, Python Q, Skovpen K, Tavernier S, Van Doninck W, Van Mulders P, Van Parijs I, Brun H, Clerbaux B, De Lentdecker G, Delannoy H, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Karapostoli G, Lenzi T, Luetic J, Maerschalk T, Marinov A, Randle-Conde A, Seva T, Vander Velde C, Vanlaer P, Vannerom D, Yonamine R, Zenoni F, Zhang F, Cimmino A, Cornelis T, Dobur D, Fagot A, Gul M, Khvastunov I, Poyraz D, Salva S, Schofbeck R, Tytgat M, Van Driessche W, Verbeke W, Zaganidis N, Bakhshiansohi H, Bondu O, Brochet S, Bruno G, Caudron A, De Visscher S, Delaere C, Delcourt M, Francois B, Giammanco A, Jafari A, Komm M, Krintiras G, Lemaitre V, Magitteri A, Mertens A, Musich M, Piotrzkowski K, Quertenmont L, Marono MV, Wertz S, Beliy N, Alda Junior WL, Alves FL, Alves GA, Brito L, Hensel C, Moraes A, Pol ME, Rebello Teles P, Belchior Batista Das Chagas E, Carvalho W, Chinellato J, Custodio A, Da Costa EM, Da Silveira GG, De Jesus Damiao D, Fonseca De Souza S, Huertas Guativa LM, Malbouisson H, Mora Herrera C, Mundim L, Nogima H, Santoro A, Sznajder A, Tonelli Manganote EJ, Torres Da Silva De Araujo F, Vilela Pereira A, Ahuja S, Bernardes CA, Fernandez Perez Tomei TR, Gregores EM, Mercadante PG, Moon CS, Novaes SF, Padula SS, Romero Abad D, Ruiz Vargas JC, Aleksandrov A, Hadjiiska R, Iaydjiev P, Rodozov M, Stoykova S, Sultanov G, Vutova M, Dimitrovet al., 2017, Search for top quark partners with charge 5/3 in proton-proton collisions at root s=13 TeV, Journal of High Energy Physics, Vol: 2017, ISSN: 1029-8479

A search for the production of heavy partners of the top quark with charge 5/3 (X5/3) decaying into a top quark and a W boson is performed with a data sample corresponding to an integrated luminosity of 2.3 fb−1, collected in proton-proton collisions at a center-of-mass energy of 13 TeV with the CMS detector at the CERN LHC. Final states with either a pair of same-sign leptons or a single lepton, along with jets, are considered. No significant excess is observed in the data above the expected standard model background contribution and an X5/3 quark with right-handed (left-handed) couplings is excluded at 95% confidence level for masses below 1020 (990) GeV. These are the first limits based on a combination of the same-sign dilepton and the single-lepton final states, as well as the most stringent limits on the X5/3 mass to date.

Journal article

Sirunyan AM, Tumasyan A, Adam W, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Eroe J, Flechl M, Friedl M, Fruehwirth R, Ghete VM, Hartl C, Hoermann N, Hrubec J, Jeitler M, Koenig A, Kraetschmer I, Liko D, Matsushita T, Mikulec I, Rabady D, Rad N, Rahbaran B, Rohringer H, Schieck J, Strauss J, Waltenberger W, Wulz C-E, Dvornikov O, Dvornikov O, Makarenko V, Mossolov V, Gonzalez JS, Zykunov V, Shumeiko N, Alderweireldt S, De Wolf EA, Janssen X, Lauwers J, Van de Klundert M, Van Haevermaet H, Van Mechelen P, Van Remortel N, Van Spilbeeck A, Abu Zeid S, Blekman F, D'Hondt J, Daci N, De Bruyn I, Deroover K, Lowette S, Moortgat S, Moreels L, Olbrechts A, Python Q, Skovpen K, Tavernier S, Van Doninck W, Van Mulders P, Van Parijs I, Brun H, Clerbaux B, De Lentdecker G, Delannoy H, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Karapostoli G, Lenzi T, Leonard A, Luetic J, Maerschalk T, Marinov A, Randle-conde A, Seva T, Vander Velde C, Vanlaer P, Vannerom D, Yonamine R, Zenoni F, Zhang F, Cimmino A, Cornelis T, Dobur D, Fagot A, Gul M, Khvastunov I, Poyraz D, Salva S, Schofbeck R, Tytgat M, Van Driessche W, Yazgan E, Zaganidis N, Bakhshiansohi H, Beluffo C, Bondu O, Brochet S, Bruno G, Caudron A, De Visscher S, Delaere C, Delcourt M, Francois B, Giammanco A, Jafari A, Komm M, Krintiras G, Lemaitre V, Magitteri A, Mertens A, Musich M, Piotrzkowski K, Quertenmont L, Selvaggi M, Marono MV, Wertz S, Beliy N, Alda Junior WL, Alves FL, Alves GA, Brito L, Hensel C, Moraes A, Pol ME, Rebello Teles P, Belchior Batista Das Chagas E, Carvalho W, Chinellato J, Custodio A, Da Costa EM, Da Silveira GG, De Jesus Damiao D, De Oliveira Martins C, Fonseca De Souza S, Huertas Guativa LM, Malbouisson H, Matos Figueiredo D, Mora Herrera C, Mundim L, Nogima H, Prado Da Silva WL, Santoro A, Sznajder A, Tonelli Manganote EJ, Torres Da Silva De Araujo F, Vilela Pereira A, Ahuja S, Bernardes CA, Dogra S, Fernandez Perez Tomei TR, Gregores EM, Mercadante PG, Moon CS, Novaes F Pet al., 2017, Measurement of the inclusive energy spectrum in the very forward direction in proton-proton collisions at root s=13 TeV, JOURNAL OF HIGH ENERGY PHYSICS, Vol: 2017, ISSN: 1029-8479

The differential cross section for inclusive particle production as a function of energy in proton-proton collisions at a center-of-mass energy of 13 TeV is measured in the very forward region of the CMS detector. The measurement is based on data collected with the CMS apparatus at the LHC, and corresponds to an integrated luminosity of 0.34 μb−1. The energy is measured in the CASTOR calorimeter, which covers the pseudorapidity region −6.6 < η < −5.2. The results are given as a function of the total energy deposited in CASTOR, as well as of its electromagnetic and hadronic components. The spectra are sensitive to the modeling of multiparton interactions in pp collisions, and provide new constraints for hadronic interaction models used in collider and in high energy cosmic ray physics.

Journal article

Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Eroe J, Flechl M, Friedl M, Fruehwirth R, Ghete VM, Grossmann J, Hoermann N, Hrubec J, Jeitler M, Koenig A, Kraetschmer I, Liko D, Madlener T, Matsushita T, Mikulec I, Pree E, Rabady D, Rad N, Rohringer H, Schieck J, Spanring M, Spitzbart D, Strauss J, Waltenberger W, Wittmann J, Wulz C-E, Zarucki M, Chekhovsky V, Mossolov V, Gonzalez JS, Shumeiko N, De Wolf EA, Janssen X, Lauwers J, Van De Klundert M, Van Haevermaet H, Van Mechelen P, Van Remortel N, Van Spilbeeck A, Abu Zeid S, Blekman F, D'Hondt J, De Bruyn I, De Clercq J, Deroover K, Lowette S, Moortgat S, Moreels L, Olbrechts A, Python Q, Skovpen K, Tavernier S, Van Doninck W, Van Mulders P, Van Parijs I, Brun H, Clerbaux B, De Lentdecker G, Delannoy H, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Karapostoli G, Lenzi T, Luetic J, Maerschalk T, Marinov A, Randle-conde A, Seva T, Velde CV, Vanlaer P, Vannerom D, Yonamine R, Zenoni F, Zhang F, Cimmino A, Cornelis T, Dobur D, Fagot A, Gul M, Khvastunov I, Poyraz D, Salva S, Schofbeck R, Tytgat M, Van Driessche W, Verbeke W, Zaganidis N, Bakhshiansohi H, Bondu O, Brochet S, Bruno G, Caudron A, De Visscher S, Delaere C, Delcourt M, Francois B, Giammanco A, Jafari A, Komm M, Krintiras G, Lemaitre V, Magitteri A, Mertens A, Musich M, Piotrzkowski K, Quertenmont L, Marono MV, Wertz S, Beliy N, Alda Junior WL, Alves FL, Alves GA, Brito L, Hensel C, Moraes A, Pol ME, Teles PR, Batista Das Chagas EB, Carvalho W, Chinellato J, Custodio A, Da Costa EM, Da Silveira GG, Damiao DDJ, De Souza SF, Huertas Guativa LM, Malbouisson H, Herrera CM, Mundim L, Nogima H, Santoro A, Sznajder A, Tonelli Manganote EJ, Da Silva De Araujo FT, Pereira AV, Ahuja S, Bernardes CA, Fernandez Perez Tomei TR, Gregores EM, Mercadante PG, Moon CS, Novaes SF, Padula SS, Abad DR, Vargas JCR, Aleksandrov A, Hadjiiska R, Iaydjiev P, Misheva M, Rodozov M, Stoykova S, Sultanov G, Vutova M, Dimiet al., 2017, Searches for W ' bosons decaying to a top quark and a bottom quark in proton-proton collisions at 13TeV, JOURNAL OF HIGH ENERGY PHYSICS, Vol: 2017, Pages: 1-42, ISSN: 1029-8479

Searches are presented for heavy gauge bosons decaying into a top and a bottom quark in data collected by the CMS experiment at s√=13 TeV that correspond to an integrated luminosity of 2.2 and 2.6 fb−1 in the leptonic and hadronic analyses, respectively. Two final states are analyzed, one containing a single electron, or muon, and missing transverse momentum, and the other containing multiple jets and no electrons or muons. No evidence is found for a right-handed W′ boson (W′R) and the combined analyses exclude at 95% confidence level W′R with masses below 2.4 TeV if MW′R≫MνR (mass of the right-handed neutrino), and below 2.6 TeV if MW′R<MνR. The results provide the most stringent limits for right-handed W′ bosons in the top and bottom quark decay channel.

Journal article

Sirunyan AM, Tumasyan A, Adam W, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Eroe J, Flechl M, Friedl M, Fruehwirth R, Ghete VM, Hartl C, Hoermann N, Hrubec J, Jeitler M, Koenig A, Kraetschmer I, Liko D, Matsushita T, Mikulec I, Rabady D, Rad N, Rahbaran B, Rohringer H, Schieck J, Strauss J, Waltenberger W, Wulz C-E, Dvornikov O, Makarenko V, Zykunov V, Mossolov V, Shumeiko N, Gonzalez JS, Alderweireldt S, De Wolf EA, Janssen X, Lauwers J, Van De Klundert M, Van Haevermaet H, Van Mechelen R, Van Remortel N, Van Spilbeeck A, Abu Zeid S, Blekman F, D'Hondt J, Daci N, De Bruyn I, Deroover K, Lowette S, Moortgat S, Moreels L, Olbrechts A, Python Q, Tavernier S, Van Doninck W, Van Mulders R, Van Parijs I, Brun H, Clerbaux B, De Lentdecker G, Delannoy H, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Karapostoli G, Lenzi T, Leonard A, Luetic J, Maerschalk T, Marinov A, Randle-Conde A, Seva T, Velde CV, Vanlaer R, Vannerom D, Yonamine R, Zenoni F, Zhang F, Cimmino A, Cornelis T, Dobur D, Fagot A, Garcia G, Gul M, Khvastunov I, Poyraz D, Salva S, Schoefbeck R, Tytgat M, Van Driessche W, Yazgan E, Zaganidis N, Bakhshiansohi H, Beluffi C, Bondu O, Brochet S, Bruno G, Caudron A, De Visscher S, Delaere C, Delcourt M, Francois B, Giammanco A, Jafari A, Jez P, Komm M, Krintiras G, Lemaitre V, Magitteri A, Mertens A, Musich M, Nuttens C, Piotrzkowski K, Quertenmont L, Selvaggi M, Marono MV, Wertz S, Beliy N, Junior WLA, Alves FL, Alves GA, Brito L, Hensel C, Moraes A, Pol ME, Rebello Teles R, Belchior Batista Das Chagas E, Carvalho W, Chinellato J, Custodio A, Da Costa EM, Da Silveira GG, De Jesus Damiao D, De Oliveira Martins C, Fonseca De Souza S, Huertas Guativa LM, Malbouisson H, Matos Figueiredo D, Mora Herrera C, Mundim L, Nogima H, Prado Da Silva WL, Santoro A, Sznajder A, Tonelli Manganote EJ, Vilela Pereira A, Ahuja S, Bernardes CA, Dogra S, Fernandez Perez Tomei TR, Gregores EM, Mercadante PG, Moon CS, Novaes SF, Padula SS, Romero Abad D, Ruiz Varet al., 2017, Cross section measurement of t-channel single top quark production in pp collisions at root s=13 TeV, PHYSICS LETTERS B, Vol: 772, Pages: 752-776, ISSN: 0370-2693

The cross section for the production of single top quarks in the t channel is measured in proton–proton collisions at 13 with the CMS detector at the LHC. The analyzed data correspond to an integrated luminosity of 2.2. The event selection requires one muon and two jets where one of the jets is identified as originating from a bottom quark. Several kinematic variables are then combined into a multivariate discriminator to distinguish signal from background events. A fit to the distribution of the discriminating variable yields a total cross section of and a ratio of top quark and top antiquark production of . From the total cross section the absolute value of the CKM matrix element is calculated to be . All results are in agreement with the standard model predictions.

Journal article

Sirunyan AM, Tumasyan A, Adam W, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Eroe J, Flechl M, Friedl M, Fruehwirth R, Ghete VM, Hartl C, Hoermann N, Hrubec J, Jeitler M, Koneig A, Kraetschmer I, Liko D, Matsushita T, Mikulec I, Rabady D, Rad N, Rahbaran B, Rohringer H, Schieck J, Strauss J, Waltenberger W, Wulz C-E, Dvornikov O, Makarenko V, Mossolov V, Gonzalez JS, Zykunov V, Shumeiko N, Alderweireldt S, De Wolf EA, Janssen X, Lauwers J, Van De Klundert M, Van Haevermaet H, Van Mechelen P, Van Remortel N, Van Spilbeeck A, Abu Zeid S, Blekman F, D'Hondt J, Daci N, De Bruyn I, Deroover K, Lowette S, Moortgat S, Moreels L, Olbrechts A, Python Q, Skovpen K, Tavernier S, Van Doninck W, Van Mulders P, Van Parijs I, Brun H, Clerbaux B, De Lentdecker G, Delannoy H, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Karapostoli G, Lenzi T, Leonard A, Luetic J, Maer-Schalk T, Marinov A, Randle-Conde A, Seva T, Velde CV, Vanlaer P, Vannerom D, Yonamine R, Zenoni F, Zhang F, Cornelis T, Dobur D, Fagot A, Gul M, Khvastunov I, Poyraz D, Salva S, Schofbeck R, Tytgat M, Van Driessche W, Yazgan E, Zaganidis N, Bakhshiansohi H, Beluffi C, Bondu O, Brochet S, Bruno G, Caudron A, De Visscher S, Delaere C, Delcourt M, Francois B, Giammanco A, Jafari A, Komm M, Krintiras G, Lemaitre V, Magitteri A, Mertens A, Musich M, Piotrzkowski K, Quertenmont L, Selvaggi M, Marono MV, Wertz S, Beliy N, Alda Junior WL, Alves FL, Alves GA, Brito L, Hensel C, Moraes A, Pol ME, Rebello Teles P, Belchior Batista Das Chagas E, Carvalho W, Chinellato J, Custodio A, Da Costa EM, Da Silveira GG, De Jesus Damiao D, De Oliveira Martins C, Fonseca De Souza S, Huertas Guativa LM, Malbouisson H, Matos Figueiredo D, Mora Herrera C, Mundim L, Nogima H, Prado Da Silva WL, Santoro A, Sznajder A, Tonelli Manganote EJ, Torres Da Silva De Araujo F, Vilela Pereira A, Ahuja S, Bernardes CA, Dogra S, Fernandez Perez Tomei TR, Gregores EM, Mercadante PC, Moon CS, Novaes SF, Padula SS, Romero Abad D, Ruiet al., 2017, Search for third-generation scalar leptoquarks and heavy right-handed neutrinos in final states with two tau leptons and two jets in proton-proton collisions at root s=13 TeV, JOURNAL OF HIGH ENERGY PHYSICS, Vol: 2017, ISSN: 1029-8479

A search is performed for third-generation scalar leptoquarks and heavy right-handed neutrinos in events containing one electron or muon, one hadronically decaying τ lepton, and at least two jets, using a s√=13s=13 TeV pp collision data sample corresponding to an integrated luminosity of 12.9 fb-1 collected with the CMS detector at the LHC in 2016. The number of observed events is found to be in agreement with the standard model prediction. A limit is set at 95% confidence level on the product of the leptoquark pair production cross section and β2, where β is the branching fraction of leptoquark decay to a τ lepton and a bottom quark. Assuming β = 1, third-generation leptoquarks with masses below 850 GeV are excluded at 95% confidence level. An additional search based on the same event topology involves heavy right-handed neutrinos, NR, and right-handed W bosons, WR, arising in a left-right symmetric extension of the standard model. In this search, WR bosons are assumed to decay to a tau lepton and NR followed by the decay of the NR to a tau lepton and an off-shell WR boson. Assuming the mass of the right-handed neutrino to be half of the mass of the right-handed W boson, WR boson masses below 2.9 TeV are excluded at 95% confidence level. These results improve on the limits from previous searches for third-generation leptoquarks and heavy right-handed neutrinos with τ leptons in the final state.

Journal article

Khachatryan V, Sirunyan AM, Tumasyan A, Adam W, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Eroe J, Flechl M, Friedl M, Fruehwirth R, Ghete VM, Hartl C, Hoermann N, Hrubec J, Jeitler M, Koenig A, Kraetschmer I, Liko D, Matsushita T, Mikulec I, Rabady D, Rad N, Rahbaran B, Rohringer H, Schieck J, Strauss J, Waltenberger W, Wulz C-E, Dvornikov O, Makarenko V, Zykunov V, Mossolov V, Shumeiko N, Gonzalez JS, Alderweireldt S, De Wolf EA, Janssen X, Lauwers J, Van de Klundert M, Van Haevermaet H, Van Mechelen P, Van Remortel N, Van Spilbeeck A, Abu Zeid S, Blekman F, D'Hondt J, Daci N, De Bruyn I, Deroover K, Lowette S, Moortgat S, Moreels L, Olbrechts A, Python Q, Tavernier S, Van Doninck W, Van Mulders P, Van Parijs I, Brun H, Clerbaux B, De Lentdecker G, Delannoy H, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Karapostoli G, Lenzi T, Leonard A, Luetic J, Maerschalk T, Marinov A, Randle-Conde A, Seva T, Vander Velde C, Vanlaer P, Vannerom D, Yonamine R, Zenoni F, Zhang F, Cimmino A, Cornelis T, Dobur D, Fagot A, Garcia G, Gul M, Khvastunov I, Poyraz D, Salva S, Schofbeck R, Sharma A, Tytgat M, Van Driessche W, Yazgan E, Zaganidis N, Bakhshiansohi H, Beluffi C, Bondu O, Brochet S, Bruno G, Caudron A, De Visscher S, Delaere C, Delcourt M, Francois B, Giammanco A, Jafari A, Jez P, Komm M, Krintiras G, Lemaitre V, Magitteri A, Mertens A, Musich M, Nuttens C, Piotrzkowski K, Quertenmont L, Selvaggi M, Marono MV, Wertz S, Beliy N, Alda Junior WL, Alves FL, Alves GA, Brito L, Hensel C, Moraes A, Pol ME, Rebello Teles P, Belchior Batista Das Chagas E, Carvalho W, Chinellato J, Custodio A, Da Costa EM, Da Silveira GG, De Jesus Damiao D, De Oliveira Martins C, Fonseca De Souza S, Huertas Guativa LM, Malbouisson H, Matos Figueiredo D, Mora Herrera C, Mundim L, Nogima H, Prado Da Silva WL, Santoro A, Sznajder A, Tonelli Manganote EJ, Vilela Pereira A, Ahuja S, Bernardes CA, Dogra S, Fernandez Perez Tomei TR, Gregores EM, Mercadante PG, Moon CS, Novaes SFet al., 2017, Search for supersymmetry in the all-hadronic final state using top quark tagging in pp collisions at root s=13 TeV, PHYSICAL REVIEW D, Vol: 96, ISSN: 2470-0010

A search is presented for supersymmetry in all-hadronic events with missing transverse momentum and tagged top quarks. The data sample was collected with the CMS detector at the LHC and corresponds to an integrated luminosity of 2.3  fb−1 of proton-proton collisions at a center-of-mass energy of 13 TeV. Search regions are defined using the properties of reconstructed jets, the multiplicity of bottom and top quark candidates, and an imbalance in transverse momentum. With no statistically significant excess of events observed beyond the expected contributions from the standard model, we set exclusion limits at 95% confidence level on the masses of new particles in the context of simplified models of direct and gluino-mediated top squark production. For direct top squark production with decays to a top quark and a neutralino, top squark masses up to 740 GeV and neutralino masses up to 240 GeV are excluded. Gluino masses up to 1550 GeV and neutralino masses up to 900 GeV are excluded for a gluino-mediated production case, where each of the pair-produced gluinos decays to a top-antitop quark pair and a neutralino.

Journal article

Khachatryan V, Sirunyan AM, Tumasyan A, Adam W, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Eroe J, Flechl M, Friedl M, Fruehwirth R, Ghete VM, Hartl C, Hoermann N, Hrubec J, Jeitler M, Koenig A, Kraetschmer I, Liko D, Matsushita T, Mikulec I, Rabady D, Rad N, Rahbaran B, Rohringer H, Schieck J, Strauss J, Waltenberger W, Wulz C-E, Mossolov V, Shumeiko N, Gonzalez JS, Alderweireldt S, De Wolf EA, Janssen X, Lauwers J, De Klundert MV, Van Haevermaet H, Van Mechelen P, Van Remortel N, Van Spilbeeck A, Abu Zeid S, Blekman F, D'Hondt J, Daci N, De Bruyn I, Deroover K, Heracleous N, Lowette S, Moortgat S, Moreels L, Olbrechts A, Python Q, Tavernier S, Van Doninck W, Van Mulders P, Van Parijs I, Brun H, Caillol C, Clerbaux B, De Lentdecker G, Delannoy H, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Karapostoli G, Lenzi T, Leonard A, Luetic J, Maerschalk T, Marinov A, Randle-Conde A, Seva T, Velde CV, Vanlaer P, Yonamine R, Zenoni F, Zhang F, Cimmino A, Cornelis T, Dobur D, Fagot A, Garcia G, Gul M, Poyraz D, Salva S, Schofbeck R, Sharma A, Tytgat M, Van Driessche W, Yazgan E, Zaganidis N, Bakhshiansohi H, Beluffi C, Bondu O, Brochet S, Bruno G, Caudron A, De Visscher S, Delaere C, Delcourt M, Francois B, Giammanco A, Jafari A, Jez P, Komm M, Lemaitre V, Magitteri A, Mertens A, Musich M, Nuttens C, Piotrzkowski K, Quertenmont L, Selvaggi M, Marono MV, Wertz S, Beliy N, Alda Junior WL, Alves FL, Alves GA, Brito L, Hensel C, Moraes A, Pol ME, Rebello Teles P, Belchior Batista Das Chagas E, Carvalho W, Chinellato J, Custodio A, Da Costa EM, Da Silveira GG, De Jesus Damiao D, De Oliveira Martins C, Fonseca De Souza S, Huertas Guativa LM, Malbouisson H, Matos Figueiredo D, Mora Herrera C, Mundim L, Nogima H, Prado Da Silva WL, Santoro A, Sznajder A, Tonelli Manganote EJ, Vilela Pereira A, Ahuja S, Bernardes CA, Dogra S, Fernandez Perez Tomei TR, Gregores EM, Mercadante PG, Moon CS, Novaes SF, Padula SS, Romero Abad D, Ruiz Vargas JC, Aleksandrov A, Hadet al., 2017, Measurement of inclusive jet cross sections in pp and PbPb collisions at root s(NN)=2.76 TeV, PHYSICAL REVIEW C, Vol: 96, ISSN: 2469-9985

Inclusive jet spectra from pp and PbPb collisions at a nucleon-nucleon center-of-mass energy of 2.76TeV, collected with the CMS detector at the CERN Large Hadron Collider, are presented. Jets are reconstructed with three different distance parameters (R=0.2, 0.3, and 0.4) for transverse momentum (pT) greater than 70GeV/c and pseudorapidity |η|<2. Next-to-leading-order quantum chromodynamic calculations with nonperturbative corrections are found to overpredict jet production cross sections in pp for small distance parameters. The jet nuclear modification factors for PbPb compared to pp collisions, show a steady decrease from peripheral to central events, along with a weak dependence on the jet pT. They are found to be independent of the distance parameter in the measured kinematic range.

Journal article

Sirunyan AM, Tumasyan A, Adam W, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Eroe J, Flechl M, Friedl M, Fruehwirth R, Ghete VM, Hartl C, Hoermann N, Hrubec J, Jeitler M, Koenig A, Kraetschmer I, Liko D, Matsushita T, Mikulec I, Rabady D, Rad N, Rahbaran B, Rohringer H, Schieck J, Strauss J, Waltenberger W, Wulz C-E, Dvornikov O, Makarenko V, Mossolov V, Gonzalez JS, Zykunov V, Shumeiko N, Alderweireldt S, De Wolf EA, Janssen X, Lauwers J, De Klundert MV, Van Haevermaet H, Van Mechelen R, Van Remortel N, Van Spilbeeck A, Abu Zeid S, Blekman F, D'Hondt J, Daci N, De Bruyn I, Deroover K, Lowette S, Moortgat S, Moreels L, Olbrechts A, Python Q, Skovpen K, Tavernier S, Van Doninck W, Van Mulders R, Van Parijs I, Brun H, Clerbaux B, De Lentdecker G, Delannoy H, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Karapostoli G, Lenzi T, Leonard A, Luetic J, Maerschalk T, Marinov A, Randle-Conde A, Seva T, Velde CV, Vanlaer R, Vannerom D, Yonamine R, Zenoni F, Zhang F, Cimmino A, Cornelis T, Dobur D, Fagot A, Gul M, Khvastunov I, Poyraz D, Salva S, Schabeck R, Tytgat M, Van Driessche W, Yazgan E, Zaganidis N, Bakhshiansohi H, Beluffi C, Bondu O, Brochet S, Bruno G, Caudron A, De Visscher S, Delaere C, Delcourt M, Francois B, Giammanco A, Jafari A, Komm M, Krintiras G, Lemaitre V, Magitteri A, Mertens A, Musich M, Piotrzkowski K, Quertenmont L, Selvaggi M, Marono MV, Wertz S, Beliy N, Alda Junior WL, Alves FL, Alves GA, Brito L, Hensel C, Moraes A, Pol ME, Rebello Teles R, Belchior Batista Das Chagas E, Carvalho W, Chinellato J, Custodio A, Da Costa EM, Da Silveira GG, De Jesus Damiao D, De Oliveira Martins C, Fonseca De Souza S, Huertas Guativa LM, Malbouisson H, Matos Figueiredo D, Mora Herrera C, Mundim L, Nogima H, Prado Da Silva WL, Santoro A, Sznajder A, Tonelli Manganote EJ, Torres Da Silva De Araujo F, Vilela Pereira A, Ahuja S, Bernardes CA, Dogra S, Fernandez Perez Tomei TR, Gregores EM, Mercadante PG, Moon CS, Novaes SF, Padula SS, Romero Abadet al., 2017, Search for single production of vector-like quarks decaying into a b quark and a W boson in proton-proton collisions at root s=13 TeV, PHYSICS LETTERS B, Vol: 772, Pages: 634-656, ISSN: 0370-2693

A search is presented for a heavy vector-like quark, decaying into a b quark and a W boson, which is produced singly in association with a light flavor quark and a b quark. The analysis is performed using a data sample of proton–proton collisions at a center-of-mass energy of collected at the LHC in 2015. The data set used in the analysis corresponds to an integrated luminosity of 2.3. The search is carried out using events containing one electron or muon, at least one b-tagged jet with large transverse momentum, at least one jet in the forward region of the detector, and missing transverse momentum. No excess over the standard model prediction is observed. Upper limits are placed on the production cross section of heavy exotic quarks: a T quark with a charge of 2/3, and a Y quark with a charge of . For Y quarks with coupling of 0.5 and , the observed (expected) lower mass limits are 1.40 (1.0). This is the most stringent limit to date on the single production of the Y vector-like quark.

Journal article

Sirunyan AM, Tumasyan A, Adam W, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Eroe J, Flechl M, Friedl M, Fruehwirth R, Ghete VM, Hartl C, Hoermann N, Hrubec J, Jeitler M, Koenig A, Kraetschmer I, Liko D, Matsushita T, Mikulec I, Rabady D, Rad N, Rahbaran B, Rohringer H, Schieck J, Strauss J, Waltenberger W, Wulz C-E, Dvornikov O, Makarenko V, Mossolov V, Gonzalez JS, Zykunov V, Shumeiko N, Alderweireldt S, De Wolf EA, Janssen X, Lauwers J, Van De Klundert M, Van Haevermaet H, Van Mechelen P, Van Remortel N, Van Spilbeeck A, Abu Zeid S, Blekman F, D'Hondt J, Daci N, De Bruyn I, Deroover K, Lowette S, Moortgat S, Moreels L, Olbrechts A, Python Q, Skovpen K, Tavernier S, Van Doninck W, Van Mulders P, Van Parijs I, Brun H, Clerbaux B, De Lentdecker G, Delannoy H, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Karapostoli G, Lenzi T, Leonard A, Luetic J, Maerschalk T, Marinov A, Randle-Conde A, Seva T, Velde CV, Vanlaer P, Vannerom D, Yonamine R, Zenoni F, Zhang F, Cimmino A, Cornelis T, Dobur D, Fagot A, Gul M, Khvastunov I, Poyraz D, Silva S, Schofbeck R, Tytgat M, Van Driessche W, Yazgan E, Zaganidis N, Bakhshiansohi H, Beluffi C, Bondu O, Brochet S, Bruno G, Caudron A, De Visscher S, Delaere C, Delcourt M, Francois B, Giammanco A, Jafari A, Komm M, Krintiras G, Lemaitre V, Magitteri A, Mertens A, Musich M, Piotrzkovvski K, Quertenmont L, Selvaggi M, Marono MV, Wertz S, Beliy N, Alda Junior WL, Alves FL, Alves GA, Brito L, Hensel C, Moraes A, Pol ME, Rebell Teles P, Belchior Batista Das Chagas E, Carvalho W, Chinellato J, Custodio A, Da Costa EM, Da Silveira GG, De Jesus Damiao D, De Oliveira Martins C, Fonseca De Souza S, Huertas Guativa LM, Malbouisson H, Matos Figueiredo D, Mora Herrera C, Mundim L, Nogima H, Prado Da Silva WL, Santoro A, Sznajder A, Tonelli Manganote EJ, Torres Da Silva De Araujo F, Vilela Pereira A, Ahuja S, Bernardes CA, Dogra S, Fernandez Perez Tomei TR, Gregores EM, Mercadante PG, Moon CS, Novaes SF, Padula SS, Romero Aet al., 2017, Measurement of the jet mass in highly boosted t(t)over-bar events from pp collisions at root s=8TeV, European Physical Journal C: Particles and Fields, Vol: 77, ISSN: 1434-6044

The first measurement of the jet mass mjetmjet of top quark jets produced in tt¯tt¯ events from pp collisions at s√=8s=8 TeVTeV is reported for the jet with the largest transverse momentum pTpT in highly boosted hadronic top quark decays. The data sample, collected with the CMS detector, corresponds to an integrated luminosity of 19.7 fb−1fb−1 . The measurement is performed in the lepton+jets channel in which the products of the semileptonic decay t→bWt→bW with W→ℓνW→ℓν where ℓℓ is an electron or muon, are used to select tt¯tt¯ events with large Lorentz boosts. The products of the fully hadronic decay t→bWt→bW with W→qq¯¯¯′W→qq¯′ are reconstructed using a single Cambridge–Aachen jet with distance parameter R=1.2R=1.2 , and pT>400pT>400 GeVGeV . The tt¯tt¯ cross section as a function of mjetmjet is unfolded at the particle level and is used to test the modelling of highly boosted top quark production. The peak position of the mjetmjet distribution is sensitive to the top quark mass mtmt , and the data are used to extract a value of mtmt to assess this sensitivity.

Journal article

Sirunyan AM, Tumasyan A, Adam W, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Eroe J, Flechl M, Friedl M, Fruehwirth R, Ghete VM, Hartl C, Hoermann N, Hrubec J, Jeitler M, Koenig A, Kraetschmer I, Liko D, Matsushita T, Mikulec I, Rabady D, Rad N, Rahbaran B, Rohringer H, Schieck J, Strauss J, Waltenberger W, Wulz C-E, Dvornikov O, Makarenko V, Mossolov V, Gonzalez JS, Zykunov V, Shumeiko N, Alderweireldt S, De Wolf EA, Janssen X, Lauwers J, Van De Klundert M, Van Haevermaet H, Van Mechelen P, Van Remortel N, Van Spilbeeck A, Abu Zeid S, Blekman F, D'Hondt J, Daci N, De Bruyn I, Deroover K, Lowette S, Moortgat S, Moreels L, Olbrechts A, Python Q, Skovpen K, Tavernier S, Van Doninck W, Van Mulders P, Van Parijs I, Brun H, Clerbaux B, De Lentdecker G, Delannoy H, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Karapostoli G, Lenzi T, Leonard A, Luetic J, Maerschalk T, Marinov A, Randle-Conde A, Seva T, Vander Velde C, Vanlaer P, Vannerom D, Yonamine R, Zenoni F, Zhang F, Cornelis T, Dobur D, Fagot A, Gul M, Khvastunov I, Poyraz D, Salva S, Schofbeck R, Tytgat M, Van Driessche W, Yazgan E, Zaganidis N, Bakhshiansohi H, Bondu O, Brochet S, Bruno G, Caudron A, De Visscher S, Delaere C, Delcourt M, Francois B, Giammanco A, Jafari A, Komm M, Krintiras G, Lemaitre V, Magitteri A, Mertens A, Musich M, Piotrzkowski K, Quertenmont L, Selvaggi M, Marono MV, Wertz S, Beliy N, Alda Junior WL, Alves FL, Alves GA, Brito L, Hensel C, Moraes A, Pol ME, Rebello Teles P, Belchior Batista Das Chagas E, Carvalho W, Chinellato J, Custodio A, Da Costa EM, Da Silveira GG, De Jesus Damiao D, De Oliveira Martins C, Fonseca De Souza S, Huertas Guativa LM, Malbouisson H, Matos Figueiredo D, Mora Herrera C, Mundim L, Nogima H, Prado Da Silva WL, Santoro A, Sznajder A, Tonelli Manganote EJ, Torres Da Silva De Araujo F, Vilela Pereira A, Ahuja S, Bernardes CA, Dogra S, Fernandez Perez Tomei TR, Gregores EM, Mercadante PG, Moon CS, Novaes SF, Padula SS, Romero Abad D, Ruiz Varget al., 2017, Measurement of double-differential cross sections for top quark pair production in pp collisions at root s=8 TeV and impact on parton distribution functions, European Physical Journal C: Particles and Fields, Vol: 77, ISSN: 1434-6044

Normalized double-differential cross sections for top quark pair (\mathrm{t}\overline{\mathrm{t}}) production are measured in pp collisions at a centre-of-mass energy of 8\,\text {TeV} with the CMS experiment at the LHC. The analyzed data correspond to an integrated luminosity of 19.7\,\text {fb}^{-1}. The measurement is performed in the dilepton \mathrm {e}^{\pm }\mu ^{\mp } final state. The \mathrm{t}\overline{\mathrm{t}} cross section is determined as a function of various pairs of observables characterizing the kinematics of the top quark and \mathrm{t}\overline{\mathrm{t}} system. The data are compared to calculations using perturbative quantum chromodynamics at next-to-leading and approximate next-to-next-to-leading orders. They are also compared to predictions of Monte Carlo event generators that complement fixed-order computations with parton showers, hadronization, and multiple-parton interactions. Overall agreement is observed with the predictions, which is improved when the latest global sets of proton parton distribution functions are used. The inclusion of the measured \mathrm{t}\overline{\mathrm{t}} cross sections in a fit of parametrized parton distribution functions is shown to have significant impact on the gluon distribution.

Journal article

Khachatryan V, Sirunyan AM, Tumasyan A, Adam W, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Eroe J, Flechl M, Friedl M, Fruehwirth R, Ghete VM, Hartl C, Hoermann N, Hrubec J, Jeitler M, Koenig A, Krammer M, Kraetschmer I, Liko D, Matsushita T, Mikulec I, Rabady D, Rad N, Rahbaran B, Rohringer H, Schieck J, Schoebeck R, Strauss J, Treberer-Treberspurg W, Waltenberger W, Wulz C-E, Mossolov V, Shumeiko N, Gonzalez JS, Alderweireldt S, Cornelis T, De Wolf EA, Janssen X, Knutsson A, Lauwers J, Luyckx S, Van De Klundert M, Van Haevermaet H, Van Mechelen R, Van Remortel N, Van Spilbeeck A, Abu Zeid S, Blekman F, D'Hondt J, Daci N, De Bruyn I, Deroover K, Heracleous N, Keaveney J, Lowette S, Moortgat S, Moreels L, Olbrechts A, Python Q, Strom D, Tavernier S, Van Doninck W, Van Mulders R, Van Onsem GP, Van Parijs I, Brun H, Caillol C, Clerbaux B, De Lentdecker G, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Karapostoli G, Lenzi T, Leonard A, Maerschalk T, Marinov A, Pernie L, Randle-Conde A, Seva T, Vander Velde C, Vanlaer R, Yonamine R, Zenoni F, Zhang F, Benucci L, Cimmino A, Crucy S, Dobur D, Fagot A, Garcia G, Gul M, Mccartin J, Rios AAO, Poyraz D, Ryckbosch D, Salva S, Sigamani M, Tytgat M, Van Driessche W, Yazgan E, Zaganidis N, Basegmez S, Beluffi C, Bondu O, Brochet S, Bruno G, Caudron A, Ceard L, De Visscher S, Delaere C, Delcourt M, Favart D, Forthomme L, Giammanco A, Jafari A, Jez R, Komm M, Lemaitre V, Mertens A, Musich M, Nuttens C, Perrini L, Piotrzkowski K, Quertenmont L, Selvaggi M, Marono MV, Beliy N, Hammad GH, Alda Junior WL, Alves FL, Alves GA, Brito L, Correa Martins Junior M, Hamer M, Hensel C, Moraes A, Pol ME, Rebello Teles R, Belchior Batista Das Chagas E, Carvalho W, Chinellato J, Custodio A, Da Costa EM, De Jesus Damiao D, De Oliveira Martins C, Fonseca De Souza S, Huertas Guativa LM, Malbouisson H, Matos Figueiredo D, Mora Herrera C, Mundim L, Nogima H, Prado Da Silva WL, Santoro A, Sznajder A, Tonelli Manganote EJ, Vilelet al., 2017, Coherent J/psi photoproduction in ultra-peripheral PbPb collisions at root s(NN)=2.76 TeV with the CMS experiment, PHYSICS LETTERS B, Vol: 772, Pages: 489-511, ISSN: 0370-2693

The cross section for coherent photoproduction accompanied by at least one neutron on one side of the interaction point and no neutron activity on the other side, , is measured with the CMS experiment in ultra-peripheral PbPb collisions at . The analysis is based on a data sample corresponding to an integrated luminosity of 159, collected during the 2011 PbPb run. The mesons are reconstructed in the dimuon decay channel, while neutrons are detected using zero degree calorimeters. The measured cross section is in the rapidity interval . Using a model for the relative rate of coherent photoproduction processes, this measurement gives a total coherent photoproduction cross section of . The data strongly disfavor the impulse approximation model prediction, indicating that nuclear effects are needed to describe coherent photoproduction in interactions. The data are found to be consistent with the leading twist approximation, which includes nuclear gluon shadowing.

Journal article

Sirunyan AM, Tumasyan A, Adam W, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Eroe J, Flechl M, Friedl M, Fruehwirth R, Ghete VM, Hartl C, Hoermann N, Hrubec J, Jeitler M, Koenig A, Kraetschmer I, Liko D, Matsushita T, Mikulec I, Rabady D, Rad N, Rahbaran B, Rohringer H, Schieck J, Strauss J, Waltenberger W, Wulz C-E, Dvornikov O, Makarenko V, Mossolov V, Gonzalez JS, Zykunov V, Shumeiko N, Alderweireldt S, De Wolf EA, Janssen X, Lauwers J, Van De Klundert M, Van Haevermaet H, Van Mechelen P, Van Remortel N, Van Spilbeeck A, Abu Zeid S, Blekman F, D'Hondt J, Daci N, De Bruyn I, Deroover K, Lowette S, Moortgat S, Moreels L, Olbrechts A, Python Q, Skovpen K, Tavernier S, Van Doninck W, Van Mulders P, Van Parijs I, Brun H, Clerbaux B, De Lentdecker G, Delannoy H, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Karapostoli G, Lenzi T, Leonard A, Luetic J, Maerschalk T, Marinov A, Randle-Conde A, Seva T, Vander Velde C, Vanlaer P, Vannerom D, Yonamine R, Zenoni F, Zhang F, Cimmino A, Cornelis T, Dobur D, Fagot A, Gul M, Khvastunov I, Poyraz D, Salva S, Schofbeck R, Tytgat M, Van Driessche W, Yazgan E, Zaganidis N, Bakhshiansohi H, Beluffi C, Bondu O, Brochet S, Bruno G, Caudron A, De Visscher S, Delaere C, Delcourt M, Francois B, Giammanco A, Jafari A, Komm M, Krintiras G, Lemaitre V, Magitteri A, Mertens A, Musich M, Piotrzkowski K, Quertenmont L, Selvaggi M, Marono MV, Wertz S, Beliy N, Alda Junior WL, Alves FL, Alves GA, Brito L, Hensel C, Moraes A, Pol ME, Rebello Teles P, Belchior Batista Das Chagas E, Carvalho W, Chinellato J, Custodio A, Da Costa EM, Da Silveira GG, De Jesus Damiao D, De Oliveira Martins C, Fonseca De Souza S, Huertas Guativa LM, Malbouisson H, Matos Figueiredo D, Mora Herrera C, Mundim L, Nogima H, Prado Da Silva WL, Santoro A, Sznajder A, Tonelli Manganote EJ, Torres Da Silva De Araujo F, Vilela Pereira A, Ahuja S, Bernardes CA, Dogra S, Fernandez Perez Tomei TR, Gregores EM, Mercadante PG, Moon CS, Novaes SF, Padula SS, Roet al., 2017, Search for new physics with dijet angular distributions in proton-proton collisions at root S = 13 TeV, Journal of High Energy Physics, Vol: 2017, ISSN: 1029-8479

A search is presented for extra spatial dimensions, quantum black holes, andquark contact interactions in measurements of dijet angular distributions in proton-protoncollisions at √s = 13 TeV. The data were collected with the CMS detector at the LHCand correspond to an integrated luminosity of 2.6 fb−1. The distributions are found tobe in agreement with predictions from perturbative quantum chromodynamics that includeelectroweak corrections. Limits for different contact interaction models are obtained.In a benchmark model, valid to next-to-leading order in QCD and in which only lefthandedquarks participate, quark contact interactions are excluded up to a scale of 11.5and 14.7 TeV for destructive or constructive interference, respectively. The productionof quantum black holes is excluded for masses below 7.8 or 5.3 TeV, depending on themodel. The lower limits for the scales of virtual graviton exchange in the Arkani-HamedDimopoulos-Dvalimodel of extra spatial dimensions are in the range 7.9–11.2 TeV, and arethe most stringent set of limits available.

Journal article

Sirunyan AM, Tumasyan A, Adam W, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Eroe J, Flechl M, Friedl M, Fruehwirth R, Ghete VM, Hartl C, Hoermann N, Hrubec J, Jeitler M, Koenig A, Kraetschmer I, Liko D, Matsushita T, Mikulec I, Rabady D, Rad N, Rahbaran B, Rohringer H, Schiecki J, Strauss J, Waltenberger W, Wulzi C-E, Dvornikov O, Makarenko V, Mossolov V, Gonzalez JS, Zykunov V, Shumeiko N, Alderweireldt S, De Wolf EA, Janssen X, Lauwers J, Van De Klundert M, Van Haevermaet H, Van Mechelen P, Van Remortel N, Van Spilbeeck A, Abu Zeid S, Blekman F, D'Hondt J, Daci N, De Bruyn I, Deroover K, Lowette S, Moortgat S, Moreels L, Olbrechts A, Python Q, Skovpen K, Tavernier S, Van Doninck W, Van Mulders P, Van Parijs I, Brun H, Clerbaux B, De Lentdecker G, Delannoy H, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Karapostoli G, Lenzi T, Leonard A, Luetic J, Maerschalk T, Marinov A, Randle-conde A, Seva T, Vander Velde C, Vanlaer P, Vannerom D, Yonamine R, Zenoni F, Zhang F, Cornelis T, Dobur D, Fagot A, Gul M, Khvastunov I, Poyraz D, Salva S, Schofbeck R, Tytgat M, Van Driessche W, Yazgan E, Zaganidis N, Bakhshiansohi H, Beluffi C, Bondu O, Brochet S, Bruno G, Caudron A, De Visscher S, Delaere C, Delcourt M, Francois B, Giammanco A, Jafari A, Komm M, Krintiras G, Lemaitre V, Magitteri A, Mertens A, Musich M, Piotrzkowski K, Quertenmont L, Selvaggi M, Marono MV, Wertz S, Beliy N, Alda Junior WL, Alves FL, Alves GA, Brito L, Hensel C, Moraes A, Pol ME, Rebello Teles P, Belchior Batista Das Chagas E, Carvalho W, Chinellato J, Custodio A, Da Costa EM, Da Silveira GG, De Jesus Damiao D, De Oliveira Martins C, Fonseca De Souza S, Huertas Guativa LM, Malbouisson H, Matos Figueiredo D, Mora Herrera C, Mundim L, Nogima H, Prado Da Silva WL, Santoro A, Sznajder A, Tonelli Manganote EJ, Torres Da Silva De Araujo F, Vilela Pereira A, Ahuja S, Bernardes CA, Dogra S, Fernandez Perez Tomei TR, Gregores EM, Mercadante PC, Moon CS, Novaes SF, Padula S, Romero Abadet al., 2017, Search for dark matter produced with an energetic jet or a hadronically decaying W or Z boson at root S=13 TeV, Journal of High Energy Physics, Vol: 2017, ISSN: 1029-8479

A search for dark matter particles is performed using events with large missing transverse momentum, at least one energetic jet, and no leptons, in proton-proton collisions at s√=13s=13 TeV collected with the CMS detector at the LHC. The data sample corresponds to an integrated luminosity of 12.9 fb−1. The search includes events with jets from the hadronic decays of a W or Z boson. The data are found to be in agreement with the predicted background contributions from standard model processes. The results are presented in terms of simplified models in which dark matter particles are produced through interactions involving a vector, axial-vector, scalar, or pseudoscalar mediator. Vector and axial-vector mediator particles with masses up to 1.95 TeV, and scalar and pseudoscalar mediator particles with masses up to 100 and 430 GeV respectively, are excluded at 95% confidence level. The results are also interpreted in terms of the invisible decays of the Higgs boson, yielding an observed (expected) 95% confidence level upper limit of 0.44 (0.56) on the corresponding branching fraction. The results of this search provide the strongest constraints on the dark matter pair production cross section through vector and axial-vector mediators at a particle collider. When compared to the direct detection experiments, the limits obtained from this search provide stronger constraints for dark matter masses less than 5, 9, and 550 GeV, assuming vector, scalar, and axial-vector mediators, respectively. The search yields stronger constraints for dark matter masses less than 200 GeV, assuming a pseudoscalar mediator, when compared to the indirect detection results from Fermi-LAT.

Journal article

Sirunyan AM, Tumasyan A, Adam W, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Eroe J, Flechl M, Friedl M, Fruehwirth R, Ghete VM, Hartl C, Hoermann N, Hrubec J, Jeitler M, Koenig A, Kraetschmer I, Liko D, Matsushita T, Mikulec I, Rabady D, Rad N, Rahbaran B, Rohringer H, Schieck J, Strauss J, Waltenberger W, Wulz C-E, Chekhovsky V, Mossolov V, Gonzalez JS, Shumeiko N, Alderweireldt S, De Wolf EA, Janssen X, Lauwers J, Van de Klundert M, Van Haevermaet H, Van Mechelen P, Van Remortel N, Van Spilbeeck A, Abu Zeid S, Blekman F, D'Hondt J, De Bruyn I, De Clercq J, Deroover K, Lowette S, Moortgat S, Moreels L, Olbrechts A, Python Q, Skovpen K, Tavernier S, Van Doninck W, Van Mulders P, Van Parijs I, Brun H, Clerbaux B, De Lentdecker G, Delannoy H, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Karapostoli G, Lenzi T, Luetic J, Maerschalk T, Marinov A, Randle-Conde A, Seva T, Velde CV, Vanlaer P, Vannerom D, Yonamine R, Zenoni F, Zhang F, Cimmino A, Cornelis T, Dobur D, Fagot A, Gul M, Khvastunov I, Poyraz D, Salva S, Schofbeck R, Tytgat M, Van Driessche W, Verbeke W, Zaganidis N, Bakhshiansohi H, Bondu O, Brochet S, Bruno G, Caudron A, De Visscher S, Delaere C, Delcourt M, Francois B, Giammanco A, Jafari A, Komm M, Krintiras G, Lemaitre V, Magitteri A, Mertens A, Musich M, Piotrzkowski K, Quertenmont L, Marono MV, Wertz S, Beliy N, Alda Junior WL, Alves FL, Alves GA, Brito L, Hensel C, Moraes A, Pol ME, Rebello Teles P, Belchior Batista Das Chagas E, Carvalho W, Chinellato J, Custodio A, Da Costa EM, Da Silveira GG, De Jesus Damiao D, Fonseca De Souza S, Huertas Guativa LM, Malbouisson H, Mora Herrera C, Mundim L, Nogima H, Santoro A, Sznajder A, Tonelli Manganote EJ, Torres Da Silva De Araujo F, Vilela Pereira A, Ahuja S, Bernardes CA, Fernandez Perez Tomei TR, Gregore EM, Mercadante PG, Moon CS, Novaes SF, Padula SS, Romero Abad D, Ruiz Vargas JC, Aleksandrov A, Hadjiiska R, Iaydjiev P, Rodozov M, Stoykova S, Sultanov G, Vutova M, Dimitrov A, Gluet al., 2017, Search for t(t)over-bar resonances in highly boosted lepton plus jets and fully hadronic final states in proton-proton collisions at root s=13 TeV, Journal of High Energy Physics, Vol: 2017, ISSN: 1029-8479

A search for the production of heavy resonances decaying into top quark-antiquark pairs is presented. The analysis is performed in the lepton+jets and fully hadronic channels using data collected in proton-proton collisions at s√=13s=13 TeV using the CMS detector at the LHC, corresponding to an integrated luminosity of 2.6 fb−1. The selection is optimized for massive resonances, where the top quarks have large Lorentz boosts. No evidence for resonant tt¯tt¯ production is found in the data, and upper limits on the production cross section of heavy resonances are set. The exclusion limits for resonances with masses above 2 TeV are significantly improved compared to those of previous analyses at s√=8s=8 TeV.

Journal article

Sirunyan AM, Tumasyan A, Adam W, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Eroe J, Flechl M, Friedl M, Fruehwirth R, Ghete VM, Hartl C, Hoermann N, Hrubec J, Jeitler M, Koenig A, Kraetschmer I, Liko D, Matsushita T, Mikulec I, Rabady D, Rad N, Rahbaran B, Rohringer H, Schieck J, Strauss J, Waltenberger W, Wulzi C-E, Dvornikov O, Makarenko V, Mossolov V, Gonzalez JS, Zykunov V, Shumeiko N, Alderweireldt S, De Wolf EA, Janssen X, Lauwers J, Van De Klundert M, Van Haevermaet H, Van Mechelen P, Van Remortel N, Van Spilbeeck A, Abu Zeid S, Blekman F, D'Hondt J, Daci N, De Bruyn I, Deroover K, Lowette S, Moortgat S, Moreels L, Olbrechts A, Python Q, Skovpen K, Tavernier S, Van Doninck W, Van Mulders P, Van Parijs I, Brun H, Clerbaux B, De Lentdecker G, Delannoy H, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Karapostoli G, Lenzi T, Leonard A, Luetic J, Maer-Schalk T, Marinov A, Randle-Conde A, Seva T, Velde CV, Vanlaer P, Vannerom D, Yonamine R, Zenoni F, Zhang F, Cimmino A, Cornelis T, Dobur D, Fagot A, Gul M, Khvastunov I, Poyraz D, Salva S, Schofbeck R, Tytgat M, Van Driessche W, Yazgan E, Zaganidis N, Bakhshiansohi H, Beluffi C, Bondu O, Brochet S, Bruno G, Caudron A, De Visscher S, Delaere C, Delcourt M, Francois B, Giammanco A, Jafari A, Komm M, Krintiras G, Lemaitre V, Magitteri A, Mertens A, Musich M, Piotrzkowski K, Quertenmont L, Selvaggi M, Marono MV, Wertz S, Beliy N, Aida Junior WL, Alves FL, Alves GA, Brito L, Hensel C, Moraes A, Pol ME, Rebello Teles P, Das Chagas EBB, Carvalho W, Chinellato J, Custodio A, Da Costa EM, Da Silveira GG, De Jesus Damiao D, De Oliveira Martins C, Fonseca De Souza S, Huertas Guativa LM, Malbouisson H, Matos Figueiredo D, Mora Herrera C, Mundim L, Nogima H, Prado Da Silva WL, Santoro A, Sznajder A, Tonelli Manganote EJ, Vilela Pereira A, Ahuja S, Bernardes CA, Dogra S, Tomei TRFP, Gregores EM, Mercadante PC, Moon CS, Novaes SF, Padulaa SS, Romero Abad D, Ruiz Vargas JC, Aleksandrov A, Hadjiiska R, Iaydet al., 2017, Search for associated production of a Z boson with a single top quark and for tZ flavour-changing interactions in pp collisions at root s=8 TeV, Journal of High Energy Physics, Vol: 2017, ISSN: 1029-8479

A search for the production of a single top quark in association with a Z boson is presented, both to identify the expected standard model process and to search for flavour-changing neutral current interactions. The data sample corresponds to an integrated luminosity of 19.7 fb−1 recorded by the CMS experiment at the LHC in proton-proton collisions at s√=8s=8 TeV. Final states with three leptons (electrons or muons) and at least one jet are investigated. An events yield compatible with tZq standard model production is observed, and the corresponding cross section is measured to be σ(pp → tZq → ℓνbℓ+ℓ−q) = 10− 7+ 8 fb with a significance of 2.4 standard deviations. No presence of flavour-changing neutral current production of tZq is observed. Exclusion limits at 95% confidence level on the branching fractions of a top quark decaying to a Z boson and an up or a charm quark are found to be ℬ(t → Zu) < 0.022% and ℬ(t → Zc) < 0.049%.

Journal article

Sirunyan AM, Tumasyan A, Adam W, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Eroe J, Flechl M, Friedl M, Fruehwirth R, Ghete VM, Hartl C, Hoermann N, Hrubec J, Jeitler M, Koenig A, Kraetschmer I, Liko D, Matsushita T, Mikulec I, Rabady D, Rad N, Rahbaran B, Rohringer H, Schieck J, Strauss J, Waltenberger W, Wulz C-E, Dvornikov O, Makarenko V, Mossolov V, SuarezGonzalez J, Zykunov V, Shumeiko N, Alderweireldt S, De Wolf EA, Janssen X, Lauwers J, Van De Klundert M, Van Haevermaet H, Van Mechelen P, Van Remortel N, Van Spilbeeck A, Abu Zeid S, Blekman F, D'Hondt J, Daci N, Bruyn ID, Deroover K, Lontkovskyi D, Lowette S, Moortgat S, Moreels L, Olbrechts A, Python Q, Skovpen K, Tavernier S, Van Doninck W, Van Mulders P, Van Parijs I, Brun H, Clerbaux B, De Lentdecker G, Delannoy H, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Karapostoli G, Lenzi T, Leonard A, Luetic J, Maerschalk T, Marinov A, Randle-conde A, Seva T, Vander Velde C, Vanlaer P, Vannerom D, Yonamine R, Zenoni F, Zhang F, Cimmino A, Cornelis T, Dobur D, Fagot A, Gul M, Khvastunov I, Poyraz D, Salva S, Schofbeck R, Tytgat M, Van Driessche W, Yazgan E, Zaganidis N, Bakhshiansohi H, Beluffi C, Bondu O, Brochet S, Bruno G, Caudron A, DeVisscher S, Delaere C, Delcourt M, Francois B, Giammanco A, Jafari A, Komm M, Krintiras G, Lemaitre V, Magitteri A, Mertens A, Musich M, Piotrzkowski K, Quertenmont L, Selvaggi M, Marono MV, Wertz S, Beliy N, Alda Junior WL, Alves FL, Alves GA, Brito L, Hensel C, Moraes A, Pol ME, Rebello Teles P, Belchior Batista Das Chagas E, Carvalho W, Chinellato J, Custodio A, Da Costa EM, Da Silveira GG, De Jesus Damiao D, De Oliveira Martins C, Fonseca De Souza S, Huertas Guativa LM, Malbouisson H, Matos Figueiredo D, Herrera CM, Mundim L, Nogima H, Prado Da Silva WL, Santoro A, Sznajder A, Tonelli Manganote EJ, Vilela Pereira A, Ahuja S, Bernardes CA, Dogra S, Fernandez Perez Tomei TR, Gregores EM, Mercadante PG, Moon CS, Novaes SF, Padula SS, Romero Abad D, Ruiet al., 2017, Search for standard model production of four top quarks in proton-proton collisions at root s=13TeV, PHYSICS LETTERS B, Vol: 772, Pages: 336-358, ISSN: 0370-2693

A search for events containing four top quarks () is reported from proton–proton collisions recorded by the CMS experiment at and corresponding to an integrated luminosity of 2.6 fb−1. The analysis considers the single-lepton (e or μ)+jets and the opposite-sign dilepton (, , or )+jets channels. It uses boosted decision trees to combine information on the global event and jet properties to distinguish between and production. The number of events observed after all selection requirements is consistent with expectations from background and standard model signal predictions, and an upper limit is set on the cross section for production in the standard model of 94 fb at 95% confidence level ( the prediction), with an expected limit of 118 fb. This is combined with the results from the published CMS search in the same-sign dilepton channel, resulting in an improved limit of 69 fb at 95% confidence level ( the prediction), with an expected limit of 71 fb. These are the strongest constraints on the rate of production to date.

Journal article

Sirunyan AM, Tumasyan A, Adam W, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Eroe J, Flechl M, Friedl M, Fruehwirth R, Ghete VM, Hartl C, Hoermann N, Hrubec J, Jeitler M, Koenig A, Kraetschmer I, Liko D, Matsushita T, Mikulec I, Rabady D, Rad N, Rahbaran B, Rohringer H, Schieck J, Strauss J, Waltenberger W, Wulz C-E, Dvornikov O, Makarenko V, Mossolov V, Gonzalez JS, Zykunov V, Shumeiko N, Alderweireldt S, De Wolf EA, Janssen X, Lauwers J, de Klundert MV, Van Haevermaet H, Van Mechelen P, Van Remortel N, Van Spilbeeck A, Abu Zeid S, Blekman F, D'Hondt J, Daci N, De Bruyn I, Deroover K, Lowette S, Moortgat S, Moreels L, Olbrechts A, Python Q, Skovpen K, Tavernier S, Van Doninck W, Van Mulders P, Van Parijs I, Brun H, Clerbaux B, De Lentdecker G, Delannoy H, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Karapostoli G, Lenzi T, Leonard A, Luetic J, Maerschalk T, Marinov A, Randle-conde A, Seva T, Vander Velde C, Vanlaer P, Vannerom D, Yonamine R, Zenoni F, Zhang F, Cimmino A, Cornelis T, Dobur D, Fagot A, Gul M, Khvastunov I, Poyraz D, Salva S, Schofbeck R, Tytgat M, Van Driessche W, Yazgan E, Zaganidis N, Bakhshiansohi H, Beluffi C, Bondu O, Brochet S, Bruno G, Caudron A, De Visscher S, Delaere C, Delcourt M, Francois B, Giammanco A, Jafari A, Komm M, Krintiras G, Lemaitre V, Magitteri A, Mertens A, Musich M, Piotrzkowski K, Quertenmont L, Selvaggi M, Marono MV, Wertz S, Beliy N, Alda Junior WL, Alves FL, Alves GA, Brito L, Hensel C, Moraes A, Pol ME, Rebello Teles P, Belchior Batista Das Chagas E, Carvalho W, Chinellato J, Custodio A, Da Costa EM, Da Silveira GG, De Jesus Damiao D, De Oliveira Martins C, Fonseca De Souza S, Huertas Guativa LM, Malbouisson H, Matos Figueiredo D, Mora Herrera C, Mundim L, Nogima H, Prado Da Silva WL, Santoro A, Sznajder A, Tonelli Manganote EJ, Torres Da Silva De Araujo F, Vilela Pereira A, Ahuja S, Bernardes CA, Dogra S, Fernandez Perez Tomei TR, Gregores EM, Mercadante PG, Moon CS, Novaes SF, Padula SS, Romeret al., 2017, Search for high-mass Z gamma resonances in proton-proton collisions at root s=8 and 13 TeV using jet substructure techniques, PHYSICS LETTERS B, Vol: 772, Pages: 363-387, ISSN: 0370-2693

AsearchformassiveresonancesdecayingtoaZbosonandaphotonisperformedineventswithahadronicallydecayingZbosoncandidate,separatelyinlight-quarkandbquarkdecaymodes,identifiedusingjetsubstructureandadvancedbtaggingtechniques.Resultsarebasedonsamplesofproton–protoncollisionscollectedwiththeCMSdetectorattheLHCatcenter-of-massenergiesof8and13TeV,correspondingtointegratedluminositiesof19.7and2.7fb−1,respectively.TheresultsofthesearcharecombinedwiththoseofasimilarsearchintheleptonicdecaymodesoftheZboson,basedonthesamedatasets.Spin-0resonanceswithvariouswidthsandwithmassesinarangebetween0.2and3.0TeVareconsidered.Nosignificantexcessisobservedeitherintheindividualanalysesorthecombination.Theresultsarepresentedintermsofupperlimitsontheproductioncrosssectionofsuchresonancesandconstitutethemoststringentlimitstodateforawiderangeofmasses.

Journal article

Sirunyan AM, Tumasyan A, Adam W, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Eroe J, Flechl M, Friedl M, Fruehwirth R, Ghete VM, Hartl C, Hoermann N, Hrubec J, Jeitler M, Koenig A, Kraetschmer I, Liko D, Matsushita T, Mikulec I, Rabady D, Rad N, Rahbaran B, Rohringer H, Schieck J, Strauss J, Waltenberger W, Wulz C-E, Dvornikov O, Makarenko V, Zykunov V, Mossolov V, Shumeiko N, Gonzalez JS, Alderweireldt S, De Wolf EA, Janssen X, Lauwers J, De Klundert MV, Van Haevermaet H, Van Mechelen P, Van Remortel N, Van Spilbeeck A, Abu Zeid S, Blekman F, D'Hondt J, Daci N, De Bruyn I, Deroover K, Lowette S, Moortgat S, Moreels L, Olbrechts A, Python Q, Tavernier S, Van Doninck W, Van Mulders P, Van Parijs I, Brun H, Clerbaux B, De Lentdecker G, Delannoy H, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Karapostoli G, Lenzi T, Leonard A, Luetic J, Maerschalk T, Marinov A, Randle-conde A, Seva T, Velde CV, Vanlaer P, Vannerom D, Yonamine R, Zenoni F, Zhang F, Cimmino A, Cornelis T, Dobur D, Fagot A, Garcia G, Gul M, Khvastunov I, Poyraz D, Salva S, Schofbeck R, Tytgat M, Van Driessche W, Yazgan E, Zaganidis N, Bakhshiansohi H, Beluffi C, Bondu O, Brochet S, Bruno G, Caudron A, De Visscher S, Delaere C, Delcourt M, Francois B, Giammanco A, Jafari A, Jez P, Komm M, Krintiras G, Lemaitre V, Magitteri A, Mertens A, Musich M, Nuttens C, Piotrzkowski K, Quertenmont L, Selvaggi M, Marono MV, Wertz S, Beliy N, Alda Junior WL, Alves FL, Alves GA, Brito L, Hensel C, Moraes A, Pol ME, Rebello Teles P, Belchior Batista Das Chagas E, Carvalho W, Chinellato J, Custodio A, Da Costa EM, Da Silveira GG, De Jesus Damiao D, De Oliveira Martins C, Fonseca De Souza S, Huertas Guativa LM, Malbouisson H, Matos Figueiredo D, Mora Herrera C, Mundim L, Nogima H, Prado Da Silva WL, Santoro A, Sznajder A, Tonelli Manganote EJ, Vilela Pereira A, Ahuja S, Bernardes CA, Dogra S, Fernandez Perez Tomei TR, Gregores EM, Mercadante PG, Moon CS, Novaes SF, Padula SS, Romero Abad D, Ruiz Varet al., 2017, Measurements of the charm jet cross section and nuclear modification factor in pPb collisions at root sNN=5.02TeV, PHYSICS LETTERS B, Vol: 772, Pages: 306-329, ISSN: 0370-2693

The CMS Collaboration presents the first measurement of the differential cross section of jets from charm quarks produced in proton–lead (pPb) collisions at a nucleon–nucleon center-of-mass energy of sNN=5.02TeV, as well as results from charm quark jets in proton–proton (pp) collisions at s=2.76 and 5.02TeV. By comparing the yields of the pPb and pp collision systems at the same energy, a nuclear modification factor for charm jets from 55 to 400 GeV/c in pPb collisions at sNN=5.02TeV of RpA=0.92±0.07(stat)±0.11(syst) is obtained. This is consistent with an absence of final-state energy loss for charm quarks in pPb collisions. In addition, the fraction of jets coming from charm quarks is found to be consistent with that predicted by pythia 6 for pp collisions at s=2.76 and 5.02TeV, and is independent of the jet transverse momentum from 55 to 400 GeV/c.

Journal article

Khachatryan V, Sirunyan AM, Tumasyan A, Adam W, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Eroe J, Flechl M, Friedl M, Fruehwirth R, Ghete VM, Hartl C, Hoermann N, Hrubec J, Jeitler M, Koenig A, Kraetschmer I, Liko D, Matsushita T, Mikulec I, Rabady D, Rad N, Rahbaran B, Rohringer H, Schieckl J, Strauss J, Treberer-Treberspurg W, Waltenberger W, Wulz C-E, Mossolov V, Shumeiko N, Gonzalez JS, Alderweireldt S, De Wolf EA, Janssen X, Lauwers J, Van de Klundert M, Van Haevermaet H, Van Mechelen P, Van Remortel N, Van Spilbeeck A, Abu Zeid S, Blekman F, D'Hondt J, Daci N, De Bruyn I, Deroover K, Heracleous N, Lowette S, Moortgat S, Moreels L, Olbrechts A, Python Q, Tavernier S, Van Doninck W, Van Mulders P, Van Parijs I, Brun H, Caillol C, Clerbaux B, De Lentdecker G, Delannoy H, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Karapostoli G, Lenzi T, Leonard A, Luetic J, Maerschalk T, Marinov A, Randle-conde A, Seva T, Vander Velde C, Vanlaer P, Yonamine R, Zenoni F, Zhang F, Cimmino A, Cornelis T, Dobur D, Fagot A, Garcia G, Gul M, Poyraz D, Salva S, Schofbeck R, Tytgat M, Van Driessche W, Yazgan E, Zaganidis N, Bakhshiansohi H, Beluffi C, Bondu O, Brochet S, Bruno G, Caudron A, De Visscher S, Delaere C, Delcourt M, Francois B, Giammanco A, Jafari A, Jez P, Komm M, Lemaitre V, Magitteri A, Mertens A, Musich M, Nuttens C, Piotrzkowski K, Quertenmont L, Selvaggi M, Marono MV, Wertz S, Beliy N, Aida Junior WL, Alves FL, Alves GA, Brito L, Hensel C, Moraes A, Pol ME, Rebello Teles P, Belchior Batista Das Chagas E, Carvalho W, Chinellato J, Custodio A, Da Costa EM, Da Silveira GG, De Jesus Damiao D, De Oliveira Martins C, Fonseca De Souza S, Huertas Guativa LM, Malbouisson H, Matos Figueiredo D, Mora Herrera C, Mundim L, Nogima H, Prado Da Silva WL, Santoro A, Sznajder A, Tonelli Manganote EJ, Vilela Pereira A, Ahuja S, Bernardes CA, Dogra S, Fernandez Perez Tomei TR, Gregores EM, Mercadante PC, Moon CS, Novaes SF, Padula SS, Romero Abad D, Ruiz Vargaet al., 2017, Measurement of electroweak-induced production of W gamma with two jets in pp collisions at root s=8TeV and constraints on anomalous quartic gauge couplings, Journal of High Energy Physics, Vol: 2017, ISSN: 1029-8479

A measurement of electroweak-induced production of Wγ and two jets is performed, where the W boson decays leptonically. The data used in the analysis correspond to an integrated luminosity of 19.7 fb−1 collected by the CMS experiment in s√=8 TeV proton-proton collisions produced at the LHC. Candidate events are selected with exactly one muon or electron, missing transverse momentum, one photon, and two jets with large rapidity separation. An excess over the hypothesis of the standard model without electroweak production of Wγ with two jets is observed with a significance of 2.7 standard deviations. The cross section measured in the fiducial region is 10.8 ± 4.1(stat) ± 3.4(syst) ± 0.3(lumi) fb, which is consistent with the standard model electroweak prediction. The total cross section for Wγ in association with two jets in the same fiducial region is measured to be 23.2 ± 4.3(stat) ± 1.7(syst) ± 0.6(lumi) fb, which is consistent with the standard model prediction from the combination of electroweak and quantum chromodynamics-induced processes. No deviations are observed from the standard model predictions and experimental limits on anomalous quartic gauge couplings fM,0−7/Λ4, fT,0−2/Λ4, and fT,5−7/Λ4 are set at 95% confidence level.

Journal article

Khachatryan V, Sirunyan AM, Tumasyan A, Adam W, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Eroe J, Flechl M, Friedl M, Fruehwirth R, Ghete VM, Hartl C, Hoermann N, Hrubec J, Jeitler M, Koenig A, Kraetschmer I, Liko D, Matsushita T, Mikulec I, Rabady D, Rad N, Rahbaran B, Rohringer H, Schieck J, Strauss J, Treberer-Treberspurg W, Waltenberger W, Wulz C-E, Mossolov V, Shumeiko N, Gonzalez JS, Alderweireldt S, De Wolf EA, Janssen X, Lauwers J, Van de Klundert M, Van Haevermaet H, Van Mechelen P, Van Remortel N, Van Spilbeeck A, Abu Zeid S, Blekman F, D'Hondt J, Daci N, De Bruyn I, Deroover K, Heracleous N, Lowette S, Moortgat S, Moreels L, Olbrechts A, Python Q, Tavernier S, Van Doninck W, Van Mulders P, Van Parijs I, Brun H, Caillol C, Clerbaux B, De Lentdecker G, Delannoy H, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Karapostoli G, Lenzi T, Leonard A, Luetic J, Maerschalk T, Marinov A, Randle-Conde A, Seva T, Vander Velde C, Vanlaer P, Yonamine R, Zenoni F, Zhang F, Cimmino A, Cornelis T, Dobur D, Fagot A, Garcia G, Gul M, Poyraz D, Salva S, Schofbeck R, Sharma A, Tytgat M, Van Driessche W, Yazgan E, Zaganidis N, Bakhshiansohi H, Beluffi C, Bondu O, Brochet S, Bruno G, Caudron A, De Visscher S, Delaere C, Delcourt M, Francois B, Giammanco A, Jafari A, Jez P, Komm M, Lemaitre V, Magitteri A, Mertens A, Musich M, Nuttens C, Piotrzkowski K, Quertenmont L, Selvaggi M, Marono MV, Wertz S, Beliy N, Alda Junior WL, Alves FL, Alves GA, Brito L, Hensel C, Moraes A, Pol ME, Rebello Teles P, Belchior Batista Das Chagas E, Carvalho W, Chinellato J, Custodio A, Da Costa EM, Da Silveira GG, De Jesus Damiao D, De Oliveira Martins C, Fonseca De Souza S, Huertas Guativa LM, Malbouisson H, Matos Figueiredo D, Mora Herrera C, Mundim L, Nogima H, Prado Da Silva WL, Santoro A, Sznajder A, Tonelli Manganote EJ, Vilela Pereira A, Ahuja S, Bernardes CA, Dogra S, Fernandez Perez Tomei TR, Gregores EM, Mercadante PG, Moon CS, Novaes SF, Padula SS, Romero Abad D Ret al., 2017, Measurement of the differential inclusive B+ hadron cross sections in pp collisions at root s=13TeV, PHYSICS LETTERS B, Vol: 771, Pages: 435-456, ISSN: 0370-2693

The differential cross sections for inclusive production of hadrons are measured as a function of the transverse momentum and rapidity in pp collisions at a centre-of-mass energy of 13 TeV, using data collected by the CMS experiment that correspond to an integrated luminosity of 48.1 pb−1. The measurement uses the exclusive decay channel , with mesons that decay to a pair of muons. The results show a reasonable agreement with theoretical calculations within the uncertainties.

Journal article

Sirunyan AM, Tumasyan A, Adam W, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Eroe J, Flechl M, Friedl M, Fruehwirth R, Ghete VM, Hartl C, Hoermann N, Hrubec J, Jeitler M, Koenig A, Kraetschmer I, Liko D, Matsushita T, Mikulec I, Rabady D, Rad N, Rahbaran B, Rohringer H, Schieck J, Strauss J, Waltenberger W, Wulz C-E, Dvornikov O, Makarenko V, Mossolov V, Gonzalez JS, Zykunov V, Shumeiko N, Alderweireldt S, De Wolf EA, Janssen X, Lauwers J, Van de Klundert M, Van Haevermaet H, Van Mechelen P, Van Remortel N, Van Spilbeeck A, Abu Zeid S, Blekman F, D'Hondt J, Daci N, De Bruyn I, Deroover K, Lowette S, Moortgat S, Moreels L, Olbrechts A, Python Q, Skovpen K, Tavernier S, Van Doninck W, Van Mulders P, Van Parijs I, Brun H, Clerbaux B, De Lentdecker G, Delannoy H, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Karapostoli G, Lenzi T, Leonard A, Luetic J, Maerschalk T, Marinov A, Randle-Conde A, Seva T, Vander Velde C, Vanlaer P, Vannerom D, Yonamine R, Zenoni F, Zhang F, Cimmino A, Cornelis T, Dobur D, Fagot A, Gul M, Khvastunov I, Poyraz D, Salva S, Schofbeck R, Tytgat M, Van Driessche W, Yazgan E, Zaganidis N, Bakhshiansohi H, Beluffi C, Bondu O, Brochet S, Bruno G, Caudron A, De Visscher S, Delaere C, Delcourt M, Francois B, Giammanco A, Jafari A, Komm M, Krintiras G, Lemaitre V, Magitteri A, Mertens A, Musich M, Piotrzkowski K, Quertenmont L, Selvaggi M, Marono MV, Wertz S, Beliy N, Alda Junior WL, Alves FL, Alves GA, Brito L, Hensel C, Moraes A, Pol ME, Rebello Teles P, Belchior Batista Das Chagas E, Carvalho W, Chinellato J, Custodio A, Da Costa EM, Da Silveira GG, De Jesus Damiao D, De Oliveira Martins C, Fonseca De Souza S, Huertas Guativa LM, Malbouisson H, Matos Figueiredo D, Mora Herrera C, Mundim L, Nogima H, Prado Da Silva WL, Santoro A, Sznajder A, Tonelli Manganote EJ, Torres Da Silva De Araujo F, Vilela Pereira A, Ahuja S, Bernardes CA, Dogra S, Fernandez Perez Tomei TR, Gregores EM, Mercadante PG, Moon CS, Novaes SF, Padula SS, Roet al., 2017, Measurement of the top quark mass using single top quark events in proton-proton collisions at root s=8 TeV, European Physical Journal C: Particles and Fields, Vol: 77, ISSN: 1434-6044

A measurement of the top quark mass is reportedin events containing a single top quark produced via the elec-troweaktchannel. The analysis is performed using data fromproton-proton collisions collected with the CMS detector atthe LHC at a centre-of-mass energy of 8 TeV, correspondingto an integrated luminosity of 19.7 fb−1. Top quark candi-dates are reconstructed from their decay to a W boson and a bquark, with the W boson decaying leptonically to a muon anda neutrino. The final state signature and kinematic propertiesof single top quark events in thetchannel are used to enhancethe purity of the sample, suppressing the contribution fromtop quark pair production. A fit to the invariant mass distribu-tion of reconstructed top quark candidates yields a value ofthe top quark mass of 172.95±0.77 (stat)+0.97−0.93(syst) GeV.This result is in agreement with the current world average,and represents the first measurement of the top quark massin event topologies not dominated by top quark pair produc-tion, therefore contributing to future averages with partiallyuncorrelated systematic uncertainties and a largely uncorre-lated statistical uncertainty.

Journal article

Sirunyan AM, Tumasyan A, Adam W, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Eroe J, Flechl M, Friedl M, Fruehwirth R, Ghete VM, Hartl C, Hoermann N, Hrubec J, Jeitler M, Koenig A, Kraetschmer I, Liko D, Matsushita T, Mikulec I, Rabady D, Rad N, Rahbaran B, Rohringer H, Schieck J, Strauss J, Waltenberger W, Wulz C-E, Chekhovsky V, Dvornikov O, Dydyshka Y, Emeliantchik I, Litomin A, Makarenko V, Mossolov V, Stefanovitch R, Gonzalez JS, Zykunov V, Shumeiko N, Alderweireldt S, De Wolf EA, Janssen X, Lauwers J, de Klundert MV, Van Haevermaet H, Van Mechelen P, Van Remortel N, Van Spilbeeck A, Abu Zeid S, Blekman E, D'Hondt J, Daci N, De Bruyn I, Deroover K, Lowette S, Moortgat S, Moreels L, Olbrechts A, Python Q, Skovpen K, Tavernier S, Van Doninck W, Van Mulders P, Van Parijs I, Brun H, Clerbaux B, De Lentdecker G, Delannoy H, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Karapostoli G, Lenzi T, Leonard A, Luetic J, Maerschalk T, Marinov A, Randle-Conde A, Seva T, Velde CV, Vanlaer P, Vannerom D, Yonamine R, Zenoni F, Zhang F, Cimmino A, Cornelis T, Dobur D, Fagot A, Gul M, Khvastunov I, Poyraz D, Salva S, Schofbeck R, Tytgat M, Van Driessche W, Yazgan E, Zaganidis N, Bakhshiansohi H, Beluffi C, Bondu O, Brochet S, Bruno G, Caudron A, De Visscher S, Delaere C, Delcourt M, Francois B, Giammanco A, Jafari A, Komm M, Krintiras G, Lemaitre V, Magitteri A, Mertens A, Musich M, Piotrzkowski K, Quertenmont L, Selvaggi M, Marono MV, Wertz S, Beliy N, Alda Junior WL, Alves FL, Alves GA, Brito L, Hensel C, Moraes A, Pol ME, Rebell Teles P, Belchior Batista Das Chagas E, Carvalho W, Chinellato J, Custodio A, Costa EMD, Da Silveira GG, De Jesus Damiao D, De Oliveira Martins C, Fonseca De Souza S, Huertas Guativa LM, Malbouisson H, Matos Figueiredo D, Mora Herrera C, Mundim L, Nogima H, Prado Da Silva WL, Santoro A, Sznajder A, Tonelli Manganote EJ, Vilela Pereira A, Ahuja S, Bernardes CA, Dogra S, Fernandez Perez Tomei TR, Gregores EM, Mercadante PG, Moonet al., 2017, Searches for pair production of third-generation squarks in root s=13 TeV pp collisions, European Physical Journal C, Vol: 77, ISSN: 1434-6052

Searches are presented for direct production oftop or bottom squark pairs in proton–proton collisions at theCERN LHC. Two searches, based on complementary tech-niques, are performed in all-jet final states that are character-ized by a significant imbalance in transverse momentum. Anadditional search requires the presence of a charged leptonisolated from other activity in the event. The data were col-lected in 2015 at a centre-of-mass energy of 13 TeV with theCMS detector and correspond to an integrated luminosity of2.3 fb−1. No statistically significant excess of events is foundbeyond the expected contribution from standard model pro-cesses. Exclusion limits are set in the context of simplifiedmodels of top or bottom squark pair production. Models withtop and bottom squark masses up to 830 and 890 GeV, respec-tively, are probed for light neutralinos. For models with topsquark masses of 675 GeV, neutralino masses up to 260 GeVare excluded at 95% confidence level.

Journal article

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