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

796 results found

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, 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, Novaes SF, Padula SS, Romero Abad D, Ruiz Vargas JC, Aleksandrov A Het al., 2018, Search for Higgsino pair production in pp collisions at root s = 13 TeV in final states with large missing transverse momentum and two Higgs bosons decaying via H -> b(b)over bar, Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol: 97, ISSN: 1550-2368

Results are reported from a search for new physics in 13 TeV proton-proton collisions in the final state with large missing transverse momentum and two Higgs bosons decaying via H -> b(b)over bar. The search uses a data sample accumulated by the CMS experiment at the LHC in 2016, corresponding to an integrated luminosity of 35.9 fb −1. The search is motivated by models based on gauge-mediated supersymmetry breaking, which predict the electroweak production of a pair of Higgsinos, each of which can decay via a cascade process to a Higgs boson and an undetected lightest supersymmetric particle. The observed event yields in the signal regions are consistent with the standard model background expectation obtained from control regions in data. Higgsinos in the mass range 230–770 GeV are excluded at 95% confidence level in the context of a simplified model for the production and decay of approximately degenerate Higgsinos.

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, 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, 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, Python Q, Skovpen K, Tavernier S, Van Doninck W, Van Mulders P, Van Parijs I, Beghin D, Brun H, Clerbaux B, De Lentdecker G, Delannoy H, Dorney B, 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, Caputo C, 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, Eelchior Batista Das Chagas E, Carvalho W, Chinellato J, Coelho E, 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, Novaes SF, Padula SS, Romero Abad D, Ruiz Vargas JC, Aleksandrovet al., 2018, Constraints on the double-parton scattering cross section from same-sign W boson pair production in proton-proton collisions at √s = 8 TeV, Journal of High Energy Physics, Vol: 2018, ISSN: 1029-8479

A first search for same-sign WW production via double-parton scattering is performed based on proton-proton collision data at a center-of-mass energy of 8 TeV using dimuon and electron-muon final states. The search is based on the analysis of data corresponding to an integrated luminosity of 19.7 fb¯¹. No significant excess of events is observed above the expected single-parton scattering yields. A 95% confidence level upper limit of 0.32 pb is set on the inclusive cross section for same-sign WW production via the double-parton scattering process. This upper limit is used to place a 95% confidence level lower limit of 12.2 mb on the effective double-parton cross section parameter, closely related to the transverse distribution of partons in the proton. This limit on the effective cross section is consistent with previous measurements as well as with Monte Carlo event generator predictions.

Journal article

Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Eroe J, Del Valle AE, Flechl M, Fried 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, Rad N, Rohringer H, Schieck J, Schoefbeck R, Spanring M, Spitzbart D, 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, Abu Zeid S, Blekman F, D'Hondt J, De Bruyn I, De Clercq J, Deroover K, Flouris C, Lontkovskyi D, Lowette S, Marchesini I, Moortgat S, Moreels L, Python Q, Skovpen K, Tavernier S, Van Doninck W, Van Mulders P, Van Parijs I, Beghin D, Bilin B, Brun H, Clerbaux B, De Lentdecker G, Delannoy H, Dorney B, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Kalsi AK, Lenzi T, Luetic J, Maerschalk T, Marinov A, Seva T, Starling E, Velde CV, Vanlaer P, Vannerom D, Yonamine R, Zenoni F, Cornelis T, Dobur D, Fagot A, Gul M, Khvastunov I, Poyraz D, Roskas C, Salva S, Tytgat M, Verheke W, Zaganidis N, Bakhshiansohi H, Bondu O, Brochet S, Bruno G, Caputo C, Caudron A, David P, De Visscher S, Delaere C, Delcourt M, Francois B, Giammanco A, Komm M, Krintiras G, Lemaitre V, Magitteri A, Mertens A, Iviusich M, Piotrzkowski K, Quertenmont L, Saggio A, Marono MV, Wertz S, Zobec J, Alda Junior WL, Alves FL, Alves GA, Brito L, Correa Martins Junior M, Hensel C, Moraes A, Pol ME, Rebell Teles P, Belchior Batista Das Chagas E, Carvalho W, Chinellato J, Coelho E, 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, Sanchez Rosas LJ, Santoro A, Sznajder A, Thiel M, Tonelli Manganote EJ, Torres Da Silva De Araujo F, Vilela Pereira A, Ahuja S, Bernardes CA, Fernandez Perez Tomei TR, Gregores EM, Mercadante PG, Novaes SF, Padula SS, Romero Abad Det al., 2018, Search for supersymmetry in proton-proton collisions at 13 TeV using identified top quarks, Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol: 97, ISSN: 1550-2368

A search for supersymmetry is presented based on proton-proton collision events containing identifiedhadronically decaying top quarks, no leptons, and an imbalance pmissT in transverse momentum. The datawere collected with the CMS detector at the CERN LHC at a center-of-mass energy of 13 TeV, andcorrespond to an integrated luminosity of 35.9 fb−1. Search regions are defined in terms of the multiplicity ofbottom quark jet and top quark candidates, the pmissT , the scalar sum of jet transverse momenta, andthe mT2 mass variable. No statistically significant excess of events is observed relative to the expectation fromthe standard model. Lower limits on the masses of supersymmetric particles are determined at 95% confidencelevel in the context of simplified models with top quark production. For a model with direct topsquark pair production followed by the decay of each top squark to a top quark and a neutralino, top squarkmasses up to 1020 GeVand neutralino masses up to 430 GeVare excluded. For a model with pair productionof gluinos followed by the decay of each gluino to a top quark-antiquark pair and a neutralino, gluino massesup to 2040 GeV and neutralino masses up to 1150 GeV are excluded. These limits extend previous results.

Journal article

Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Ero J, Flechl M, Friedl M, Fruhwirth R, Ghete VM, Grossmann J, Hrubec J, Jeitler M, Konig A, Krammer N, Kratschmer I, Liko D, Madlener T, Mikulec I, Pree E, Rad N, Rohringer H, Schieck J, Schofbeck R, Spanring M, Spitzbart D, 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, Abu Zeid S, Blekman F, D'Hondt J, De Bruyn I, De Clercq J, Deroover K, Flouris G, Lontkovskyi D, Lowette S, Marchesini I, Moortgat S, Moreels L, Python Q, Skovpen K, Tavernier S, Van Doninck W, Van Mulders P, Van Parijs I, Beghin D, Brun H, Clerbaux B, De Lentdecker G, Delannoy H, Dorney B, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Lenzi T, Luetic J, Maerschalk T, Marinov A, Seva T, Starling E, 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, Caputo C, Caudron A, David P, De Visscher S, Delaere C, Delcourt M, Francois B, Giammanco A, Komm M, Krintiras G, Lemaitre V, Magitteri A, Mertens A, Musich M, Piotrzkowski K, Quertenmont L, Saggio A, Marono MV, Wertz S, Zobec J, Alda Junior WL, Alves FL, Alves GA, Brito L, Martins Junior MC, Hensel C, Moraes A, Pol ME, Teles PR, Das Chagas EBB, Carvalho W, Chinellato J, Coelho E, Da Costa EM, Da Silveira GG, Damiao DDJ, De Souza SF, Guativa LMH, Malbouisson H, De Almeida MM, Herrera CM, Mundim L, Nogima H, Rosas LJS, Santoro A, Sznajder A, Thiel M, Manganote EJT, Torres Da Silva De Araujo F, Pereira AV, Ahuja S, Bernardes CA, Tomei TRFP, Gregores EM, Mercadante PG, Novaes SF, Padula SS, Abad DR, Vargas JCR, Aleksandrov A, Hadjiiska R, Iaydjiev P, Misheva M, Rodozov M, Shopova M, Sultanov G, Dimitrov Aet al., 2018, Search for low mass vector resonances decaying into quark-antiquark pairs in proton-proton collisions at root s=13 TeV, Journal of High Energy Physics, Vol: 2018, ISSN: 1029-8479

A search for narrow vector resonances decaying into quark-antiquark pairs ispresented. The analysis is based on data collected in proton-proton collisions at √s =13 TeV with the CMS detector at the LHC, corresponding to an integrated luminosity of35.9 fb−1. The hypothetical resonance is produced with sufficiently high transverse momentumthat its decay products are merged into a single jet with two-prong substructure. Asignal would be identified as a peak over a smoothly falling background in the distributionof the invariant mass of the jet, using novel jet substructure techniques. No evidence forsuch a resonance is observed within the mass range of 50–300 GeV. Upper limits at 95%confidence level are set on the production cross section, and presented in a mass-couplingparameter space. The limits further constrain simplified models of dark matter productioninvolving a mediator interacting between quarks and dark matter particles through avector or axial-vector current. In the framework of these models, the results are the mostsensitive to date, extending for the first time the search region to masses below 100 GeV.

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, Gonzalez JS, De Wolf EA, Di Croce D, Janssen X, Lauwers J, Van Haevermaet H, Van Mechelen P, Van Remortel N, 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, 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, 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, Novaes SF, Padula S, Romero Abad D, Ruiz Vargas JC, Aleksandrov A, Hadjiiska R, Iaydjiev P, Misheva M, Rodet al., 2018, Search for the pair production of third-generation squarks with two-body decays to a bottom or charm quark and a neutralino in proton–proton collisions at √s = 13 TeV, Physics Letters B, Vol: 778, Pages: 263-291, ISSN: 0370-2693

Results are presented from a search for the pair production of third-generation squarks in proton–protoncollision events with two-body decays to bottom or charm quarks and a neutralino, which produces asignificant imbalance in the transverse momentum. The search is performed using a sample of proton–proton collision data at √s = 13 TeV recorded by the CMS experiment at the LHC, corresponding to anintegrated luminosity of 35.9 fb¯¹. No statistically significant excess of events is observed beyond theexpected contribution from standard model processes. Exclusion limits are set in the context of simplifiedmodels of bottom or top squark pair production. Models with bottom squark masses up to 1220 GeV areexcluded at 95% confidence level for light neutralinos, and models with top squark masses of 510 GeVare excluded assuming that the mass splitting between the top squark and the neutralino is small.

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, 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 Haevermaet H, Van Mechelen P, Van Remortel N, 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, 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, Teles PR, Das Chagas EBB, Carvalho W, Chinellato J, Custodio A, Da Costa EM, Da Silveira GG, Damiao DDJ, De Souza SF, Guativa LMH, Malbouisson H, De Almeida MM, Herrera CM, Mundim L, Nogima H, Santoro A, Sznajder A, Manganote EJT, Da Silva De Araujo FT, Pereira AV, Ahuja S, Bernardes CA, Tomei TRFP, Gregores EM, Mercadante PG, Novaes SF, Padula SS, Abad DR, Vargas JCR, Aleksandrov A, Hadjiiska R, Iaydjiev P, Misheva M, Rodozov M, Shopova M, Stoykova S, Sultanov G, Dimitrov A, Glushkov I, Litov L, Pavlov B, Petkov P, Fanet al., 2018, Search for resonant and nonresonant Higgs boson pair production in the b(b)over-barl nu l nu final state in proton-proton collisions at root s=13 TeV, JOURNAL OF HIGH ENERGY PHYSICS, Vol: 2018, ISSN: 1029-8479

Searches for resonant and nonresonant pair-produced Higgs bosons (HH) decayingrespectively into `ν`ν, through either W or Z bosons, and bb are presented. The ¯analyses are based on a sample of proton-proton collisions at √s = 13 TeV, collected bythe CMS experiment at the LHC, corresponding to an integrated luminosity of 35.9 fb−1.Data and predictions from the standard model are in agreement within uncertainties. Forthe standard model HH hypothesis, the data exclude at 95% confidence level a product ofthe production cross section and branching fraction larger than 72 fb, corresponding to 79times the standard model prediction. Constraints are placed on different scenarios consideringanomalous couplings, which could affect the rate and kinematics of HH production.Upper limits at 95% confidence level are set on the production cross section of narrowwidthspin-0 and spin-2 particles decaying to Higgs boson pairs, the latter produced withminimal gravity-like coupling.

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, Koeonig A, Krammer N, Kraetschmer I, Liko D, Madlener T, Mikulec I, Pree E, Rad N, Rohringer H, Schieck J, Schoefbeck R, Spanring M, Spitzbart D, 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, 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, Python Q, Skovpen K, Tavernier S, Van Doninck W, Van Mulders P, Van Parijs I, Beghin D, Brun H, Clerbaux B, De Lentdecker G, Delannoy H, Dorney B, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Karapostoli G, Lenzi T, Luetic J, Maerschalk T, Marinov A, Seva T, Starling E, 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, Caputo C, Caudron A, David P, De Visscher S, Delaere C, Delcourt M, Francois B, Giammanco A, Komm M, Krintiras G, Lemaitre V, Magitteri A, Mertens A, Musich M, Piotrzkowski K, Quertenmont L, Saggio A, Marono MV, Wertz S, Zobec J, Beliy N, Alda Junior WL, Alves FL, Alves GA, Brito L, Correa Martins Junior M, Hensel C, Moraes A, Pol ME, Teles PR, Belchior Batista Das Chagas E, Carvalho W, Chinellato J, Coelho E, Da Costa EM, Da Silveira GG, Damiao DDJ, De Souza SF, Guativa LMH, Malbouisson H, De Almeida MM, Herrera CM, Mundim L, Nogima H, Rosas LJS, Santoro A, Sznajder A, Thiel M, Tonelli Manganote EJ, Torres Da Silva De Araujo F, Ahuja S, Bernardes CA, Fernandez Perez Tomei TR, Gregores EM, Mercadante PG, Novaes SF, Padula SS, Romero Abad D, Ruiz Vargas JC, Aleksandrov A, Hadjiiska R, Iaydjiev P Met al., 2018, Pseudorapidity distributions of charged hadrons in proton-lead collisions at root s(NN)=5:02 and 8.16 TeV, Journal of High Energy Physics, Vol: 2018, ISSN: 1029-8479

The pseudorapidity distributions of charged hadrons in proton-lead collisionsat nucleon-nucleon center-of-mass energies √sNN = 5.02 and 8.16 TeV are presented.The measurements are based on data samples collected by the CMS experiment at theLHC. The number of primary charged hadrons produced in non-single-diffractive protonleadcollisions is determined in the pseudorapidity range |ηlab| < 2.4. The chargedhadronmultiplicity distributions are compared to the predictions from theoretical calculationsand Monte Carlo event generators. In the center-of-mass pseudorapidity range|ηcm| < 0.5, the average charged-hadron multiplicity densities hdNch/dηcmi |ηcm|< 0.5 are17.31 ± 0.01 (stat) ± 0.59 (syst) and 20.10 ± 0.01 (stat) ± 0.85(syst) at √sNN = 5.02 and8.16 TeV, respectively. The particle densities per participant nucleon are compared tosimilar measurements in proton-proton, proton-nucleus, and nucleus-nucleus collisions.

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, Kraeteschmer 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, 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, Teles PR, 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., 2018, Azimuthal anisotropy of charged particles with transverse momentum up to 100GeV/c in PbPb collisions at root S-NN=5.02 TeV, Physics Letters B, Vol: 776, Pages: 195-216, ISSN: 0370-2693

The Fourier coefficients v2 and v3 characterizing the anisotropy of the azimuthal distribution of chargedparticles produced in PbPb collisions at √sNN = 5.02 TeV are measured with data collected by the CMSexperiment. The measurements cover a broad transverse momentum range, 1 < pT < 100 GeV/c. Theanalysis focuses on the pT > 10 GeV/c range, where anisotropic azimuthal distributions should reflect thepath-length dependence of parton energy loss in the created medium. Results are presented in severalbins of PbPb collision centrality, spanning the 60% most central events. The v2 coefficient is measuredwith the scalar product and the multiparticle cumulant methods, which have different sensitivities toinitial-state fluctuations. The values from both methods remain positive up to pT ∼ 60–80 GeV/c, in allexamined centrality classes. The v3 coefficient, only measured with the scalar product method, tends tozero for pT 20 GeV/c. Comparisons between theoretical calculations and data provide new constraintson the path-length dependence of parton energy loss in heavy ion collisions and highlight the importanceof the initial-state fluctuations

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 Haevermaet H, Van Mechelen P, Van Remortel N, 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, 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, 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, Novaes SF, Padula SS, Romero Abad D, Ruiz Vargas JC, Aleksandrov A, Hadjiiska R, Iaydjiev P Met al., 2018, Search for Higgs boson pair production in events with two bottomquarks and two tau leptons in proton–proton collisions at √s = 13 TeV, Physics Letters B, Vol: 778, Pages: 101-127, ISSN: 0370-2693

A search for the production of Higgs boson pairs in proton–proton collisions at a centre-of-mass energy of13 TeV is presented, using a data sample corresponding to an integrated luminosity of 35.9 fb¯¹ collectedwith the CMS detector at the LHC. Events with one Higgs boson decaying into two bottom quarksand the other decaying into two τ leptons are explored to investigate both resonant and nonresonantproduction mechanisms. The data are found to be consistent, within uncertainties, with the standardmodel background predictions. For resonant production, upper limits at the 95% confidence level areset on the production cross section for Higgs boson pairs as a function of the hypothesized resonancemass and are interpreted in the context of the minimal supersymmetric standard model. For nonresonantproduction, upper limits on the production cross section constrain the parameter space for anomalousHiggs boson couplings. The observed (expected) upper limit at 95% confidence level corresponds to about30 (25) times the prediction of the standard model.

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 Haevermaet H, Van Mechelen P, Van Remortel N, 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, 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, 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, Novaes SF, Padula SS, Romero Abad D, Ruiz Vargas JC, Aleksandrov A, Hadjiiska R, Iaydjiev P Met al., 2017, Search for supersymmetry in events with at least one photon, missing transverse momentum, and large transverse event activity in proton-proton collisions at root s=13TeV, Journal of High Energy Physics, Vol: 2017, ISSN: 1029-8479

A search for physics beyond the standard model in final states with at least one photon, large transverse momentum imbalance, and large total transverse event activity is presented. Such topologies can be produced in gauge-mediated supersymmetry models in which pair-produced gluinos or squarks decay to photons and gravitinos via short-lived neutralinos. The data sample corresponds to an integrated luminosity of 35.9 fb−1 of proton-proton collisions at s√=13 TeV recorded by the CMS experiment at the LHC in 2016. No significant excess of events above the expected standard model background is observed. The data are interpreted in simplified models of gluino and squark pair production, in which gluinos or squarks decay via neutralinos to photons. Gluino masses of up to 1.50-2.00 TeV and squark masses up to 1.30-1.65 TeV are excluded at 95% confidence level, depending on the neutralino mass and branching fraction.

Journal article

Sirunyan AM, Turnasyan A, Adam W, Arribrogi F, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Ero J, Del Valle AE, Flechl M, Friedl M, Fruehwirth R, Ghete VM, Grossmann J, Hrubec J, Jeitler M, Konig A, Krammer N, Kratschmer I, Liko D, Madlener T, Mikulec I, Pree E, Rad N, Rohringer H, Schieck J, Schofbeck R, Spanring M, Spitzbart D, Waltenberger W, Wittmann J, Wulzj 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, Abu Zeid S, Blekman F, D'Hondt J, De Bruyn I, De Clercq J, Deroover K, Flouris G, Lontkovskyi D, Lowette S, Marchesini I, Moortgat S, Moreels L, Python Q, Skovpen K, Tavernier S, Van Doninck W, Van Mulders P, Van Parijs I, Beghin D, Biltn B, Brun H, Clerbaux B, De Lentdecker G, Delannoy H, Dorney B, Fasanella G, Favart L, Goldouzian R, Grebenyuk A, Kalsi AK, Lenzi T, Luetic J, Maerschalk T, Marinov A, Seva T, Starling E, Vander Velde C, Vanlaer P, Vannerom D, Yonamine R, Zenoni F, Cornelis T, Dobur D, Fagot A, Gu M, Khvastunov I, Poyraz D, Roskas C, Salva S, Tytgat M, Verbeke W, Zaganidis N, Bakhshiansohi H, Bondu O, Brochet S, Bruno G, Caputo C, Caudron A, David P, De Visscher S, Delaere C, Delcourt M, Francois B, Giammanco A, Komm M, Krintiras G, Lemaitre V, Magitteri A, Mertens A, Iviusich M, Piotrzkowski K, Quertenmont L, Saggio A, Marono MV, Wertz S, Zobec J, Alda Junior WL, Alves FL, Alves GA, Brito L, Martins Junior MC, Hensel C, Moraes A, Pol ME, Teles PR, Das Chagas EBB, Carvalho W, Chinellato J, Coelho E, 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, Sanchez Rosas LJ, Santoro A, Sznajder A, Thiel M, Tonelli Manganote EJ, Da Silva De Araujo FT, Vilela Pereira A, Ahuja S, Bernardes CA, Perez Tomei TRF, Gregores EM, Mercadante PG, Novaes SF, Padula SS, Romero Abad D, Ruiz Vargas JC, Aleksandrov A, Hadjiet al., 2017, Observation of Top Quark Production in Proton-Nucleus Collisions, Physical Review Letters, Vol: 119, ISSN: 0031-9007

The first observation of top quark production in proton-nucleus collisions is reported using proton-leaddata collected by the CMS experiment at the CERN LHC at a nucleon-nucleon center-of-mass energy of ffiffiffiffiffiffiffiffisNN p ¼ 8.16 TeV. The measurement is performed using events with exactly one isolated electron or muoncandidate and at least four jets. The data sample corresponds to an integrated luminosity of 174 nb−1.The significance of the t¯t signal against the background-only hypothesis is above 5 standard deviations.The measured cross section is σt¯t ¼ 45 8 nb, consistent with predictions from perturbative quantumchromodynamics.

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, Jesus Damiao DD, 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, Dimitrov A, Gluset al., 2017, Search for dark matter produced in association with heavy-flavor quark pairs in proton-proton collisions at root s=13 TeV, EUROPEAN PHYSICAL JOURNAL C, Vol: 77, ISSN: 1434-6044

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, 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 Haevermaet H, Van Mechelen P, Van Remortel N, 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, 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, Roskas C, Salva S, Tytgat M, Verbeke W, Zaganidis N, Bakhshiansohi H, Bondu O, Brochet S, Bruno G, Caputo C, 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, Novaes SF, Padula SS, Romero Abad D, Ruiz Vargas JC, Aleksandrov A, Hadjiiska R, Iaydjiev P, Misheva M, Rodoet al., 2017, Search for heavy resonances decaying to a top quark and a bottom quark in the lepton+jets final state in proton-proton collisions at 13 TeV, Physics Letters B, Vol: 777, Pages: 39-63, ISSN: 0370-2693

A search is presented for narrow heavy resonances decaying to a top quark and a bottom quark using data collected by the CMS experiment at in 2016. The data set analyzed corresponds to an integrated luminosity of 35.9 . Final states that include a single lepton (e, μ), multiple jets, and missing transverse momentum are analyzed. No evidence is found for the production of a boson, and the production of right-handed bosons is excluded at 95% confidence level for masses up to 3.6 depending on the scenario considered. Exclusion limits for bosons are also presented as a function of their coupling strength to left- and right-handed fermions. These limits on a boson decaying via a top and a bottom quark are the most stringent published to date.

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, 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, 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 Vargas JC, Aleksandrov A, Haet al., 2017, Principal-component analysis of two-particle azimuthal correlations in PbPb and pPb collisions at CMS, Physical Review C - Nuclear Physics, Vol: 96, ISSN: 0556-2813

For the first time a principle-component analysis is used to separate out different orthogonal modes of the two-particle correlation matrix from heavy ion collisions. The analysis uses data from √sNN=2.76TeV PbPb and √sNN=5.02TeV pPb collisions collected by the CMS experiment at the CERN Large Hadron Collider. Two-particle azimuthal correlations have been extensively used to study hydrodynamic flow in heavy ion collisions. Recently it was shown that the expected factorization of two-particle results into a product of the constituent single-particle anisotropies is broken. The new information provided by these modes may shed light on the breakdown of flow factorization in heavy ion collisions. The first two modes (“leading” and “subleading”) of two-particle correlations are presented for elliptical and triangular anisotropies in PbPb and pPb collisions as a function of pT over a wide range of event activity. The leading mode is found to be essentially equivalent to the anisotropy harmonic previously extracted from two-particle correlation methods. The subleading mode represents a new experimental observable and is shown to account for a large fraction of the factorization breaking recently observed at high transverse momentum. The principle-component analysis technique was also applied to multiplicity fluctuations. These also show a subleading mode. The connection of these new results to previous studies of factorization is discussed.

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, Teles PR, Das Chagas EBB, Carvalho W, Chinellato J, Custodio A, Da Costa EM, Da Silveira GG, Damiao DDJ, Martins CDO, De Souza SF, Huertas Guativa LM, Malbouisson H, Matos Figueiredo D, Mora Herrera C, Mundim L, Nogima H, Da Silva WLP, Santoro A, Sznajder A, Tonelli Manganote EJ, Torres Da Silva De Araujo F, Pereira AV, 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, Hadjiiska Ret al., 2017, Measurement of charged pion, kaon, and proton production in proton-proton collisions at root s=13 TeV, Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol: 96, ISSN: 1550-2368

Transverse momentum spectra of charged pions, kaons, and protons are measured in proton-proton collisions at √s=13  TeV with the CMS detector at the LHC. The particles, identified via their energy loss in the silicon tracker, are measured in the transverse momentum range of pT≈0.1–1.7  GeV/c and rapidities |y|<1. The pT spectra and integrated yields are compared to previous results at smaller √s and to predictions of Monte Carlo event generators. The average pT increases with particle mass and charged particle multiplicity of the event. Comparisons with previous CMS results at √s=0.9, 2.76, and 7 TeV show that the average pT and the ratios of hadron yields feature very similar dependences on the particle multiplicity in the event, independently of the center-of-mass energy of the pp collision.

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, 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 Haevermaet H, Van Mechelen P, Van Remortel N, 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, 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, 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, Novaes SF, Padula SS, Romero Abad D, Ruiz Vargas JC, Aleksandrov A, Hadjiiska R, Iaydjiev P, Misheva M, Rodozov M, Shoet al., 2017, Search for Evidence of the Type-III Seesaw Mechanism in Multilepton Final States in Proton-Proton Collisions at root s=13 TeV, PHYSICAL REVIEW LETTERS, Vol: 119, ISSN: 0031-9007

A search for a signal consistent with the type-III seesaw mechanism in events with three or more electrons or muons is presented. The data sample consists of proton-proton collisions at s=13  TeV collected by the CMS experiment at the LHC in 2016 and corresponds to an integrated luminosity of 35.9  fb−1. Selection criteria based on the number of leptons and the invariant mass of oppositely charged lepton pairs are used to distinguish the signal from the standard model background. The observations are consistent with the expectations from standard model processes. The results are used to place limits on the production of heavy fermions of the type-III seesaw model as a function of the branching ratio to each lepton flavor. In the scenario of equal branching fractions to each lepton flavor, heavy fermions with masses below 840 GeV are excluded. This is the most sensitive probe to date of the type-III seesaw mechanism.

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, Hörmann N, Hrubec J, Jeitler M, König A, Krätschmer I, Liko D, Matsushita T, Mikulec I, Rabady D, Rad N, Rohringer H, Schieck J, Strauss J, Waltenberger W, Wulz CE, Chekhovsky V, Mossolov V, Suarez Gonzalez J, 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, Schöfbeck R, Tytgat M, Van Driessche W, Verbeke W, Zaganidis N, Bakhshiansohi H, Bondu O, Brochet S, Bruno G, Caudron A, De Visscher S, Delaere Cet al., 2017, Measurements of tt¯ cross sections in association with b jets and inclusive jets and their ratio using dilepton final states in pp collisions at s=13TeV, Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol: 776, Pages: 355-378, ISSN: 0370-2693

The cross sections for the production of tt¯bb¯ and tt¯jj events and their ratio σ tt¯bb¯ /σ tt¯jj are measured using data corresponding to an integrated luminosity of 2.3 fb −1 collected in pp collisions at s=13 TeV with the CMS detector at the LHC. Events with two leptons (e or μ) and at least four reconstructed jets, including at least two identified as b quark jets, in the final state are selected. In the full phase space, the measured ratio is 0.022±0.003(stat)±0.006(syst), the cross section σ tt¯bb¯ is 4.0±0.6(stat)±1.3(syst) pb and σ tt¯jj is 184±6(stat)±33(syst) pb. The measurements are compared with the standard model expectations obtained from a POWHEG simulation at next-to-leading-order interfaced with PYTHIA.

Journal article

Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Drag-Icevic M, Eroe J, Flechl M, Friedl M, Fruewirth 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 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 Vet al., 2017, Search for pair production of vector-like T and B quarks in single-lepton final states using boosted jet substructure in proton-proton collisions at root s=13 TeV, JOURNAL OF HIGH ENERGY PHYSICS, Vol: 2017, ISSN: 1029-8479

A search for pair production of massive vector-like T and B quarks in proton-proton collisions at s√=13 TeV is presented. The data set was collected in 2015 by the CMS experiment at the LHC and corresponds to an integrated luminosity of up to 2.6 fb−1. The T and B quarks are assumed to decay through three possible channels into a heavy boson (either a W, Z or Higgs boson) and a third generation quark. This search is performed in final states with one charged lepton and several jets, exploiting techniques to identify W or Higgs bosons decaying hadronically with large transverse momenta. No excess over the predicted standard model background is observed. Upper limits at 95% confidence level on the T quark pair production cross section are set that exclude T quark masses below 860 GeV in the singlet, and below 830 GeV in the doublet branching fraction scenario. For other branching fraction combinations with ℬ(T → tH) + ℬ(T → bW) ≥ 0.4, lower limits on the T quark range from 790 to 940 GeV. Limits are also set on pair production of singlet vector-like B quarks, which can be excluded up to a mass of 730 GeV. The techniques showcased here for understanding highly-boosted final states are important as the sensitivity to new particles is extended to higher masses.

Journal article

Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Asilar E, Bergauer T, Brandstetter J, Brondolin E, 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, Waltenberger W, Wittmann J, Wulzi C-E, Zarucki M, Chekhovsky V, Mossolov V, Gonzalez JS, De Wolf EA, Di Croce D, Janssen X, Lauwers J, Van Haevermaet H, Van Mechelen P, Van Remortel N, 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, 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, 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 PC, Novaes SF, Padula SS, Romero Abad D, Ruiz Vargas JC, Aleksandrov A, Hadjiiska R, Iaydjiev P, Misheva M, Rodozov M, Shoet al., 2017, Measurements of properties of the Higgs boson decaying into the four-lepton final state in pp collisions at root s=13 TeV, JOURNAL OF HIGH ENERGY PHYSICS, Vol: 2017, ISSN: 1029-8479

Properties of the Higgs boson are measured in the H → ZZ → 4ℓ (ℓ = e, μ) decay channel. A data sample of proton-proton collisions at s√=13 TeV, collected with the CMS detector at the LHC and corresponding to an integrated luminosity of 35.9 fb−1 is used. The signal strength modifier μ, defined as the ratio of the observed Higgs boson rate in the H → ZZ → 4ℓ decay channel to the standard model expectation, is measured to be μ = 1.05− 0.17+ 0.19 at mH = 125.09 GeV, the combined ATLAS and CMS measurement of the Higgs boson mass. The signal strength modifiers for the individual Higgs boson production modes are also measured. The cross section in the fiducial phase space defined by the requirements on lepton kinematics and event topology is measured to be 2. 92− 0.44+ 0.48(stat)− 0.24+ 0.28(syst)fb, which is compatible with the standard model prediction of 2.76 ± 0.14 fb. Differential cross sections are reported as a function of the transverse momentum of the Higgs boson, the number of associated jets, and the transverse momentum of the leading associated jet. The Higgs boson mass is measured to be mH = 125.26 ± 0.21 GeV and the width is constrained using the on-shell invariant mass distribution to be ΓH < 1.10 GeV, at 95% confidence level.

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 Haevermaet H, Van Mechelen P, Van Remortel N, 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, 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, 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, Novaes SF, Padula SS, Romero Abad D, Ruiz Vargas JC, Aleksandrov A, Hadjiiska R, Iaydjiev P Met al., 2017, Search for electroweak production of charginos and neutralinos in WH events in proton-proton collisions at root s=13 TeV, Journal of High Energy Physics, Vol: 2017, ISSN: 1029-8479

Results are reported from a search for physics beyond the standard model in proton-proton collision events with a charged lepton (electron or muon), two jets identified as originating from a bottom quark decay, and significant imbalance in the transverse momentum. The search was performed using a data sample corresponding to 35.9 fb−1, collected by the CMS experiment in 2016 at s√=13s=13 TeV. Events with this signature can arise, for example, from the electroweak production of gauginos, which are predicted in models based on supersymmetry. The event yields observed in data are consistent with the estimated standard model backgrounds. Limits are obtained on the cross sections for chargino-neutralino (χ~±1χ~02)(χ~1±χ~20) production in a simplified model of supersymmetry with the decays χ±1→W±χ~01andχ~02→Hχ01χ1±→W±χ~10andχ~20→Hχ10 . Values of mχ~±1mχ~1± between 220 and 490 GeV are excluded at 95% confidence level by this search when the χ~01χ~10 is massless, and values of mχ~01mχ~10 are 1 excluded up to 110 GeV for mχ~±1≈450mχ~1±≈450 GeV.

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, 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 P, 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 P, 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, Randle-conde A, Seva T, Vander Velde C, Vanlaer P, 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, Schofbeck R, Sigamani M, Tytgat M, Van Driessche W, Yazgan E, Zaganidis N, Beluffi C, Bondu O, Brochet S, Bruno G, Caudron A, Ceard L, De Visscher S, Delaere C, Delcourt M, Forthomme L, 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, 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 P, Belchior Batista Das Chagas E, Carvalho W, Chinellato J, Custodio A, Da Costa EM, De Jesus Damiao D, Martins CDO, 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 Cet al., 2017, Measurements of the associated production of a Z boson and b jets in pp collisions at root s=8 TeV, EUROPEAN PHYSICAL JOURNAL C, Vol: 77, ISSN: 1434-6044

Measurements of the associated production of aZ boson with at least one jet originating from a b quark inproton–proton collisions at√s=8 TeV are presented. Dif-ferential cross sections are measured with data collected bythe CMS experiment corresponding to an integrated lumi-nosity of 19.8 fb−1. Z bosons are reconstructed through theirdecays to electrons and muons. Cross sections are measuredas a function of observables characterizing the kinematics ofthe b jet and the Z boson. Ratios of differential cross sec-tions for the associated production with at least one b jet tothe associated production with any jet are also presented. Theproduction of a Z boson with at least two b jets is investigated,and differential cross sections are measured for the dijet sys-tem. Results are compared to theoretical predictions, testingtwo different flavour schemes for the choice of initial-statepartons.

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, Cornelis T, Dobur D, Fagot A, Gul M, Khvastunov I, Poyraz D, Salva S, Schofbeck R, Tytgat M, Van Driessche 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, Selvaggi M, Marono MV, Wertz S, Beliy N, Junior WLA, Alves FL, Alves GA, Brito L, Hensel C, Moraes A, Pol ME, Teles PR, 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 Vargas JC, Aleksandrov A, Haet al., 2017, Measurement of the triple-differential dijet cross section in proton-proton collisions at root s=8 TeV and constraints on parton distribution functions, EUROPEAN PHYSICAL JOURNAL C, Vol: 77, ISSN: 1434-6044

A measurement is presented of the triple-differential dijet cross section at a centre-of-mass energy of 8TeV using 19.7fb-1 of data collected with the CMS detector in proton-proton collisions at the LHC. The cross section is measured as a function of the average transverse momentum, half the rapidity separation, and the boost of the two leading jets in the event. The cross section is corrected for detector effects and compared to calculations in perturbative quantum chromodynamics at next-to-leading order accuracy, complemented with electroweak and nonperturbative corrections. New constraints on parton distribution functions are obtained and the inferred value of the strong coupling constant is αS(MZ)=0.1199±0.0015(exp)+0.0031−0.0020(theo), where MZ is the mass of the Z boson.

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, Schoebeck R, Spanring M, Spitzbart D, 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 Haevermaet H, Van Mechelen P, Van Remortel N, 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, 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, Damiao DDJ, De Souza SF, Guativa LMH, Malbouisson H, De Almeida MM, Herrera CM, 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 PC, Novaes SF, Padula SS, Abad DR, Vargas JCR, Aleksandrov A, Hadjiiska R, Iaydjiev P, Misheva M, Rodozov M, Shopova M, Stoykova S, Sultanov G, Diet al., 2017, Search for a light pseudoscalar Higgs boson produced in association with bottom quarks in pp collisions at root s=8 TeV, JOURNAL OF HIGH ENERGY PHYSICS, Vol: 2017, ISSN: 1029-8479

A search for a light pseudoscalar Higgs boson (A) produced in association with bottom quarks and decaying into a muon pair is reported. The search uses 19.7 fb−1 of proton-proton collisions at a center-of-mass energy of 8 TeV, collected by the CMS experiment. No signal is observed in the dimuon mass range from 25 to 60 GeV. Upper limits on the cross section times branching fraction, σ(pp→bb¯¯¯A)B(A→μμ), are set.

Journal article

Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Ero J, Flechl M, Friedl M, Fruhwirth R, Ghete VM, Grossmann J, Hormann N, Hrubec J, Jeitler M, Konig A, Kratschmer I, Liko D, Madlener T, Mikulec I, Pree E, Rabady D, Rad N, Rohringer H, Schieck J, Schofbeck 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, 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, De Bruyn I, De Clercq J, Deroover K, Flouris G, 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, Luetic J, Maerschalk T, Marinov A, Randle-Conde A, Seva T, Vander Velde C, 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, 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 WLJ, Alves FL, Alves GA, Brito L, Hensel C, Moraes A, Pol ME, Teles RR, Das Chagas EBB, Carvalho W, Chinellato J, Custodio A, Da Costa EM, Da Silveira GG, Damiao DDJ, De Souza SF, Guativa LMH, Malbouisson H, De Almeida MM, Herrera CM, Mundim L, Nogima H, Santoro A, Sznajder A, Manganote EJT, De Araujo FTDS, Pereira AV, Ahuja S, Bernardes CA, Tomei TRFP, Gregores EM, Mercadante PG, Moon CS, Novaes SF, Padula SS, Abad DR, Vargas JCR, Aleksandrov A, Hadjiiska R, Iaydjiev R, Misheva M, Rodozov M, Stoykova S, Sultanov G, Vutova M, Dimitrov A, Glushkov I, Litov L, Pavlov B, Petkov R, Fang W, Gao X, Ahmet al., 2017, Search for a heavy composite Majorana neutrino in the final state with two leptons and two quarks at root s=13 TeV, Physics Letters B, Vol: 775, Pages: 315-337, ISSN: 0370-2693

A search for physics beyond the standard model in the final state with two same-flavour leptons(electrons or muons) and two quarks produced in proton–proton collisions at √s = 13 TeV is presented.The data were recorded by the CMS experiment at the CERN LHC and correspond to an integratedluminosity of 2.3 fb−1. The observed data are in good agreement with the standard model backgroundprediction. The results of the measurement are interpreted in the framework of a recently proposedmodel in which a heavy Majorana neutrino, N, stems from a composite-fermion scenario. Exclusionlimits are set for the first time on the mass of the heavy composite Majorana neutrino, mN , and thecompositeness scale . For the case mN = , the existence of Ne (Nμ) is excluded for masses up to 4.60(4.70) TeV at 95% confidence level.

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, Free 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, 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, Novaes SF, Padula SS, Romero Abad D, Ruiz Vargas JC, Aleksandrov A Het al., 2017, Measurement of the differential cross sections for the associated production of a W boson and jets in proton-proton collisions at root s=13 TeV, PHYSICAL REVIEW D, Vol: 96, ISSN: 2470-0010

A measurement of the differential cross sections for a W boson produced in association with jets in the muon decay channel is presented. The measurement is based on 13 TeV proton-proton collision data corresponding to an integrated luminosity of 2.2  fb−1, recorded by the CMS detector at the LHC. The cross sections are reported as functions of jet multiplicity, jet transverse momentum pT, jet rapidity, the scalar pT sum of the jets, and angular correlations between the muon and each jet for different jet multiplicities. The measured cross sections are in agreement with predictions that include multileg leading-order (LO) and next-to-LO matrix element calculations interfaced with parton showers, as well as a next-to-next-to-LO calculation for the W boson and one jet production.

Journal article

Sirunyan AM, Tumasyan A, Johnson 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, 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, 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 Ret al., 2017, Search for new phenomena with the M-T2 variable in the all-hadronic final state produced in proton-proton collisions at root s=13TeV, European Physical Journal C: Particles and Fields, Vol: 77, ISSN: 1434-6044

A search for new phenomena is performed using events with jets and significant transverse momentum imbalance, as inferred through the MT2MT2 variable. The results are based on a sample of proton–proton collisions collected in 2016 at a center-of-mass energy of 13 TeVTeV with the CMS detector and corresponding to an integrated luminosity of 35.9 fb-1fb-1. No excess event yield is observed above the predicted standard model background, and the results are interpreted as exclusion limits at 95% confidence level on the masses of predicted particles in a variety of simplified models of R-parity conserving supersymmetry. Depending on the details of the model, 95% confidence level lower limits on the gluino (light-flavor squark) masses are placed up to 2025 (1550) GeVGeV. Mass limits as high as 1070 (1175) GeVGeV are set on the masses of top (bottom) squarks. Information is provided to enable re-interpretation of these results, including model-independent limits on the number of non-standard model events for a set of simplified, inclusive search regions.

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, 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 PC, Moon CS, Novaes SF, Padula SS, Romero Abad D, Ruiz Vargas JCet al., 2017, Search for associated production of dark matter with a Higgs boson decaying to b(b)over-bar or gamma gamma at root s=13 TeV, JOURNAL OF HIGH ENERGY PHYSICS, Vol: 2017, ISSN: 1029-8479

A search for dark matter is performed looking for events with large missing transverse momentum and a Higgs boson decaying either to a pair of bottom quarks or to a pair of photons. The data from proton-proton collisions at a center-of-mass energy of 13 TeV, collected in 2015 with the CMS detector at the LHC, correspond to an integrated luminosity of 2.3 fb−1. Results are interpreted in the context of a Z′-two-Higgs-doublet model, where the gauge symmetry of the standard model is extended by a U(1)Z ′ group, with a new massive Z′ gauge boson, and the Higgs sector is extended with four additional Higgs bosons. In this model, a high-mass resonance Z′ decays into a pseudoscalar boson A and a light SM-like scalar Higgs boson, and the A decays to a pair of dark matter particles. No significant excesses are observed over the background prediction. Combining results from the two decay channels yields exclusion limits in the signal cross section in the mZ ′ - mA phase space. For example, the observed data exclude the Z′ mass range from 600 to 1860 GeV, for Z′ coupling strength gZ ′ = 0.8, the coupling of A with dark matter particles gχ = 1, the ratio of the vacuum expectation values tan β = 1, and mA = 300 GeV. The results of this analysis are valid for any dark matter particle mass below 100 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, 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, 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, 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 Tomet al., 2017, Search for Higgs boson pair production in the bb tau state in proton-proton collisions at root(s)=8 TeV, PHYSICAL REVIEW D, Vol: 96, ISSN: 2470-0010

Results are presented from a search for production of Higgs boson pairs (HH) where one boson decays to a pair of b quarks and the other to a τ lepton pair. This work is based on proton-proton collision data collected by the CMS experiment at √s=8  TeV, corresponding to an integrated luminosity of 18.3  fb−1. Resonant and nonresonant modes of HH production have been probed and no significant excess relative to the background-only hypotheses has been found in either mode. Upper limits on cross sections of the two HH production modes have been set. The results have been combined with previously published searches at √s=8  TeV, in decay modes to two photons and two b quarks, as well as to four b quarks, which also show no evidence for a signal. Limits from the combination have been set on resonant HH production by an unknown particle X in the mass range mX=300  GeV to mX=1000  GeV. For resonant production of spin 0 (spin 2) particles, the observed 95% CL upper limit is 1.13 pb (1.09 pb) at mX=300  GeV and to 21 fb (18 fb) at mX=1000  GeV. For nonresonant HH production, a limit of 43 times the rate predicted by the standard model has been set.

Journal article

Sirunyan AM, Tumasyan A, Adam W, Asilar E, Bergauer T, Brandstetter J, Brondolin E, Dragicevic M, Ero J, Flechl M, Friedl M, Fruhwirth R, Ghete VM, Hartl C, Hormann N, Hrubec J, Jeitler M, Konig A, Kratschmer 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, 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, 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 Ret al., 2017, Measurements of jet charge with dijet events in pp collisions at root s=8 TeV, JOURNAL OF HIGH ENERGY PHYSICS, Vol: 2017, ISSN: 1029-8479

Jet charge is an estimator of the electric charge of a quark, antiquark, or gluon initiating a jet. It is based on the momentum-weighted sum of the electric charges of the jet constituents. Measurements of three charge observables of the leading jet in transverse momentum pT are performed with dijet events. The analysis is carried out with ata collected by the CMS experiment at the CERN LHC in proton-proton collisions at s√=8s=8 TeV corresponding to an integrated luminosity of 19.7fb−1. The results are presented as a function of the pT of the leading jet and compared to predictions from leading- and next-to-leading-order event generators combined with parton showers. Measured jet charge distributions, unfolded for detector effects, are reported, which expand on previous measurements of the jet charge average and standard deviation in pp collisions.

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, Schofbeck R, Spanring M, Spitzbart D, 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 Haevermaet H, Van Mechelen P, Van Remortel N, 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, 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, Roskas C, Salva S, Tytgat M, Verbeke W, Zaganidis N, Bakhshiansohi H, Bondu O, Brochet S, Bruno G, Caputo C, 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, Novaes SF, Padula SS, Romero Abad D, Ruiz Vargas C, Aleksandrov A, Hadjiiska R, Iaydjiev P, Misheva M, Rodozoet al., 2017, Measurement of vector boson scattering and constraints on anomalous quartic couplings from events with four leptons and two jets in proton-proton collisions at root s=13 TeV, Physics Letters B, Vol: 774, Pages: 682-705, ISSN: 0370-2693

A measurement of vector boson scattering and constraints on anomalous quartic gauge couplings from events with two Z bosons and two jets are presented. The analysis is based on a data sample of proton–proton collisions at collected with the CMS detector and corresponding to an integrated luminosity of 35.9. The search is performed in the fully leptonic final state , where or μ. The electroweak production of two Z bosons in association with two jets is measured with an observed (expected) significance of 2.7 (1.6) standard deviations. A fiducial cross section for the electroweak production is measured to be , which is consistent with the standard model prediction. Limits on anomalous quartic gauge couplings are determined in terms of the effective field theory operators T0, T1, T2, T8, and T9. This is the first measurement of vector boson scattering in the channel at the LHC.

Journal article

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