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  • Journal article
    Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Bergauer T, Chatterjee S, Damanakis K, Dragicevic M, Escalante Del Valle A, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Mikulec I, Schieck J, Schöfbeck R, Schwarz D, Sonawane M, Templ S, Waltenberger W, Wulz CE, Darwish MR, Janssen T, Van Mechelen P, Bols ES, D'Hondt J, Dansana S, De Moor A, Delcourt M, El Faham H, Lowette S, Makarenko I, Müller D, Sahasransu AR, Tavernier S, Tytgat M, Van Putte S, Vannerom D, Clerbaux B, De Lentdecker G, Favart L, Hohov D, Jaramillo J, Khalilzadeh A, Lee K, Mahdavikhorrami M, Malara A, Paredes S, Pétré L, Postiau N, Thomas L, Vanden Bemden M, Vander Velde C, Vanlaer P, De Coen M, Dobur D, Hong Y, Knolle J, Lambrecht L, Mestdach G, Rendón C, Samalan A, Skovpen K, Van Den Bossche N, Wezenbeek L, Benecke A, Bruno G, Caputo C, Delaere C, Donertas IS, Giammanco A, Jaffel K, Jain S, Lemaitre V, Lidrych J, Mastrapasqua P, Mondal K, Tran TT, Wertz S, Alves GA, Coelho E, Hensel C, Menezes De Oliveira T, Moraes A, Rebello Teles P, Soeiro M, Aldá Júnior WL, Alves Gallo Pereira M, Barroso Ferreira Filho M, Brandao Malbouisson H, Carvalho W, Chinellato J, Da Costa EM, Da Silveira GG, De Jesus Damiao D, Fonseca De Souza S, Martins J, Mora Herrera C, Mota Amarilo Ket al., 2025,

    Search for a standard model-like Higgs boson in the mass range between 70 and 110 GeV in the diphoton final state in proton-proton collisions at s=13TeV

    , Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol: 860, ISSN: 0370-2693

    The results of a search for a standard model-like Higgs boson decaying into two photons in the mass range between 70 and 110 GeV are presented. The analysis uses the data set collected by the CMS experiment in proton-proton collisions at s=13TeV corresponding to integrated luminosities of 36.3fb−1, 41.5fb−1 and 54.4fb−1 during the 2016, 2017, and 2018 LHC running periods, respectively. No significant excess over the background expectation is observed and 95% confidence level upper limits are set on the product of the cross section and branching fraction for decays of an additional Higgs boson into two photons. The maximum deviation with respect to the background is seen for a mass hypothesis of 95.4 GeV with a local (global) significance of 2.9 (1.3) standard deviations. The observed upper limit ranges from 15 to 73 fb.
  • Journal article
    Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Bergauer T, Chatterjee S, Damanakis K, Dragicevic M, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Mikulec I, Schieck J, Schöfbeck R, Schwarz D, Sonawane M, Templ S, Waltenberger W, Wulz CE, Darwish MR, Janssen T, Van Laer T, Van Mechelen P, Breugelmans N, D'Hondt J, Dansana S, De Moor A, Delcourt M, Heyen F, Lowette S, Makarenko I, Müller D, Tavernier S, Tytgat M, Van Onsem GP, Van Putte S, Vannerom D, Bilin B, Clerbaux B, Das AK, De Lentdecker G, Evard H, Favart L, Gianneios P, Jaramillo J, Khalilzadeh A, Khan FA, Lee K, Mahdavikhorrami M, Malara A, Paredes S, Shahzad MA, Thomas L, Vanden Bemden M, Vander Velde C, Vanlaer P, De Coen M, Dobur D, Gokbulut G, Hong Y, Knolle J, Lambrecht L, Marckx D, Mota Amarilo K, Samalan A, Skovpen K, Van Den Bossche N, van der Linden J, Wezenbeek L, Benecke A, Bethani A, Bruno G, Caputo C, De Favereau De Jeneret J, Delaere C, Donertas IS, Giammanco A, Guzel AO, Jain S, Lemaitre V, Lidrych J, Mastrapasqua P, Tran TT, Wertz S, Alves GA, Alves Gallo Pereira M, Coelho E, Correia Silva G, Hensel C, Menezes De Oliveira T, Mora Herrera C, Moraes A, Rebello Teles P, Soeiro M, Vilela Pereira A, Aldá Júnior WL, Barroso Ferreira Filho M, Brandao Malbouisson Het al., 2025,

    Study of WH production through vector boson scattering and extraction of the relative sign of the W and Z couplings to the Higgs boson in proton-proton collisions at s=13TeV

    , Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol: 860, ISSN: 0370-2693

    A search for the production of a W boson and a Higgs boson through vector boson scattering (VBS) is presented, using CMS data from proton-proton collisions at s=13TeV collected from 2016 to 2018. The integrated luminosity of the data sample is 138fb−1. Selected events must be consistent with the presence of two jets originating from VBS, the leptonic decay of the W boson to an electron or muon, possibly also through an intermediate τ lepton, and a Higgs boson decaying into a pair of b quarks, reconstructed as either a single merged jet or two resolved jets. A measurement of the process as predicted by the standard model (SM) is performed alongside a study of beyond-the-SM (BSM) scenarios. The SM analysis sets an observed (expected) 95% confidence level upper limit of 14.3 (9.9) on the ratio of the measured VBS WH cross section to that expected by the SM. The BSM analysis, conducted within the so-called κ framework, excludes all scenarios with λWZ<0 that are consistent with current measurements, where λWZ=κW/κZ and κW and κZ are the HWW and HZZ coupling modifiers, respectively. The significance of the exclusion is beyond 5 standard deviations, and it is consistent with the SM expectation of λWZ=1.
  • Journal article
    Saha S, Banik S, Dutta A, Paramanik T, Pakhira S, Dey S, Bandyopadhyay S, Mazumdar C, Das Iet al., 2025,

    Role of Co/Mn Interaction in Developing Griffiths Phase with Reducing Particle Size in La<inf>2</inf>CoMnO<inf>6</inf>

    , ACS Applied Materials and Interfaces, ISSN: 1944-8244

    A comprehensive study on the transition from the non-Griffiths phase (NGP) to the Griffiths phase (GP) is reported in double-perovskite La2CoMnO6 with the reduction of particle sizes. The bulk compound exhibits two ferromagnetic (FM) transitions, a prominent one below around TC ∼ 155 K and a weak one below TC1 ∼ 85 K. However, the materials in the nanocrystalline form show only one FM transition below TC ∼ 220 K. Interestingly, short-range FM interactions consisting of small FM clusters have been observed above TC for all of the systems. However, the nature of intercluster interactions of the preformed FM clusters in the PM matrix differs in bulk and nanomaterials. The antiferromagnetic (AFM) and FM intercluster interactions, respectively, result in the evolution of NGP in bulk and GP in nanomaterials. A detailed magnetization and transport study along with the theoretical analysis reveal that the existent AFM intercluster interaction and the enhanced antisite disorder (ASD) restrict the formation of GP in the bulk material. In contrast, due to the FM intercluster interaction and, as a consequence of the pronounced grain boundary as well as surface pressure effects in core-shell nanostructured materials, ASDs are reduced and GP emerges in those systems.
  • Journal article
    Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Bergauer T, Chatterjee S, Damanakis K, Dragicevic M, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Mikulec I, Schieck J, Schöfbeck R, Schwarz D, Sonawane M, Waltenberger W, Wulz CE, Janssen T, Van Laer T, Van Mechelen P, Breugelmans N, D'Hondt J, Dansana S, De Moor A, Delcourt M, Heyen F, Lowette S, Makarenko I, Müller D, Tavernier S, Tytgat M, Van Onsem GP, Van Putte S, Vannerom D, Bilin B, Clerbaux B, Das AK, De Lentdecker G, Evard H, Favart L, Gianneios P, Jaramillo J, Khalilzadeh A, Khan FA, Lee K, Mahdavikhorrami M, Malara A, Paredes S, Shahzad MA, Thomas L, Vanden Bemden M, Vander Velde C, Vanlaer P, De Coen M, Dobur D, Gokbulut G, Hong Y, Knolle J, Lambrecht L, Marckx D, Mota Amarilo K, Skovpen K, Van Den Bossche N, van der Linden J, Wezenbeek L, Benecke A, Bethani A, Bruno G, Caputo C, De Favereau De Jeneret J, Delaere C, Donertas IS, Giammanco A, Guzel AO, Jain S, Lemaitre V, Lidrych J, Mastrapasqua P, Tran TT, Wertz S, Alves GA, Alves Gallo Pereira M, Coelho E, Correia Silva G, Hensel C, Menezes De Oliveira T, Mora Herrera C, Moraes A, Rebello Teles P, Soeiro M, Vilela Pereira A, Aldá Júnior WL, Barroso Ferreira Filho M, Brandao Malbouisson H, Carvalho W, Chinellato J, Da Costa EMet al., 2025,

    Search for bottom quark associated production of the standard model Higgs boson in final states with leptons in proton-proton collisions at s=13TeV

    , Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol: 860, ISSN: 0370-2693

    This Letter presents the first search for bottom quark associated production of the standard model Higgs boson, in final states with leptons. Higgs boson decays to pairs of tau leptons and pairs of leptonically decaying W bosons are considered. The search is performed using data collected from 2016 to 2018 by the CMS experiment in proton-proton collisions at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 138fb−1. Upper limits at the 95% confidence level are placed on the signal strength for Higgs boson production in association with bottom quarks; the observed (expected) upper limit is 3.7 (6.1) times the standard model prediction.
  • Journal article
    Karikar A, Das K, Das I, 2025,

    Magnetoresistive and magnetocaloric properties of polycrystalline Sm<inf>0.50</inf>Sr<inf>0.50</inf>MnO<inf>3</inf> compound with short range magnetic ordering

    , Journal of Materials Science: Materials in Electronics, Vol: 36, ISSN: 0957-4522

    In this study, the magnetic and magneto-transport properties of polycrystalline Sm0.50Sr0.50MnO3 have been investigated. The presence of short-range magnetic order plays a crucial role in influencing electron transport, making it a promising pathway for tuning magnetoresistive properties for specific applications. This research focuses on the effects of magnetic nanoclusters on spin-dependent scattering and their impact on magneto-transport and magnetocaloric properties in polycrystalline Sm0.50Sr0.50MnO3. Experimental results reveal a significant magnetocaloric effect and notable magnetoresistance within the liquid nitrogen temperature range. At 100 K, the magnetoresistance reaches approximately 70% under an external magnetic field of 20 kOe. The magnetocaloric entropy change is calculated to be 3.5 J/kg-K for a 70 kOe magnetic field, with the entropy change curve exhibiting a broadened peak, leading to a substantial Relative Cooling Power (RCP). These findings enhance our understanding of the material’s behavior and highlight its potential for various technological applications.
  • Journal article
    Aaij R, Abdelmotteleb ASW, Abellan Beteta C, Abudinén F, Ackernley T, Adefisoye AA, Adeva B, Adinolfi M, Adlarson P, Agapopoulou C, Aidala CA, Ajaltouni Z, Akar S, Akiba K, Albicocco P, Albrecht J, Alessio F, Alexander M, Aliouche Z, Alvarez Cartelle P, Amalric R, Amato S, Amey JL, Amhis Y, An L, Anderlini L, Andersson M, Andreianov A, Andreola P, Andreotti M, Andreou D, Anelli A, Ao D, Archilli F, Argenton M, Arguedas Cuendis S, Artamonov A, Artuso M, Aslanides E, Ataíde Da Silva R, Atzeni M, Audurier B, Bacher D, Bachiller Perea I, Bachmann S, Bachmayer M, Back JJ, Baladron Rodriguez P, Balagura V, Baldini W, Balzani L, Bao H, Baptista de Souza Leite J, Barbero Pretel C, Barbetti M, Barbosa IR, Barlow RJ, Barnyakov M, Barsuk S, Barter W, Bartolini M, Bartz J, Basels JM, Bashir S, Bassi G, Batsukh B, Battista PB, Bay A, Beck A, Becker M, Bedeschi F, Bediaga IB, Behling NA, Belin S, Bellee V, Belous K, Belov I, Belyaev I, Benane G, Bencivenni G, Ben-Haim E, Berezhnoy A, Bernet R, Bernet Andres S, Bertolin A, Betancourt C, Betti F, Bex J, Bezshyiko I, Bhom J, Bieker MS, Biesuz NV, Billoir P, Biolchini A, Birch M, Bishop FCR, Bitadze A, Bizzeti A, Blake T, Blanc F, Blank JE, Blusk S, Bocharnikov V, Boelhauve JA, Boente Garcia O, Boettcher T, Bohare A, Boldyrev A, Bolognani CS, Bolzonella R, Bondar N, Bordelius A, Borgato F, Borghi S, Borsato M, Borsuk JT, Bouchiba SA, Bovill M, Bowcock TJV, Boyer A, Bozzi C, Brea Rodriguez A, Breer N, Brodzicka J, Brossa Gonzalo A, Brown J, Brundu D, Buchanan E, Buonaura A, Buonincontri L, Burke AT, Burr C, Butkevich A, Butter JS, Buytaert J, Byczynski W, Cadeddu S, Cai H, Caillet AC, Calabrese R, Calderon Ramirez S, Calefice L, Cali S, Calvi M, Calvo Gomez M, Camargo Magalhaes P, Cambon Bouzas JI, Campana P, Campora Perez DH, Campoverde Quezada AF, Capelli S, Capriotti L, Caravaca-Mora R, Carbone A, Carcedo Salgado L, Cardinale R, Cardini A, Carniti P, Carus L, Casais Vidal A, Caspary R, Casse G, Castro Godinez J, Cattaneo M, Cavalleet al., 2024,

    Measurement of Λ_{b}^{0}, Λ_{c}^{+}, and Λ Decay Parameters Using Λ_{b}^{0}→Λ_{c}^{+}h^{-} Decays.

    , Phys Rev Lett, Vol: 133

    A comprehensive study of the angular distributions in the bottom-baryon decays Λ_{b}^{0}→Λ_{c}^{+}h^{-}(h=π,K), followed by Λ_{c}^{+}→Λh^{+} with Λ→pπ^{-} or Λ_{c}^{+}→pK_{S}^{0} decays, is performed using a data sample of proton-proton collisions corresponding to an integrated luminosity of 9  fb^{-1} collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV. The decay parameters and the associated charge-parity (CP) asymmetries are measured, with no significant CP violation observed. For the first time, the Λ_{b}^{0}→Λ_{c}^{+}h^{-} decay parameters are measured. The most precise measurements of the decay parameters α, β, and γ are obtained for Λ_{c}^{+} decays and an independent measurement of the decay parameters for the strange-baryon Λ decay is provided. The results deepen our understanding of weak decay dynamics in baryon decays.
  • Journal article
    Pal K, Dey S, Alam A, Das Iet al., 2024,

    Revealing exchange bias in spin compensated systems for spintronics applications.

    , Sci Rep, Vol: 14

    Antiferromagnetic materials offer potential for spintronic applications due to their resilience to magnetic field perturbations and lack of stray fields. Achieving exchange bias in these materials is crucial for certain applications; however, discovering such materials remains challenging due to their compensated spin structure. The quest for antiferromagnetic materials with exchange bias became a reality through our experimental study and theoretical simulation on Sr 2 FeIrO 6 and Sr 2 CoIrO 6 . This study also unveils the impact of ionic disorder and lattice distortion on magnetic properties. The presence of exchange bias in both materials, given their antiferromagnetic nature, is intriguing. This study opens up new avenues for achieving exchange bias in spin-compensated systems, offering potential for low power and ultra fast antiferromagnetic spintronic applications in future research endeavors.
  • Journal article
    Chatterjee S, Das I, 2024,

    Desertion of anomalous magnetic transition and emergence of metallic state in Cu doped Eu2Ru2O7 pyrochlore.

    , J Chem Phys, Vol: 161

    In this paper, we present a detailed investigation of the structural, magnetic, and electrical transport properties of Eu2-xCuxRu2O7 (x = 0, 0.2, 0.4) pyrochlores. X-ray diffraction measurements confirm the single-phase nature of all samples and also manifest the reduction of lattice parameters with the increase in copper doping concentration. The experimental results of the magnetic measurements indicate that an anomalous magnetic transition around 23 K arises due to the contribution of non-magnetic Eu3+ ions. The strength of this unnatural magnetic transition reduces with decreasing Eu concentration [i.e., with increasing copper doping (x)] and finally disappears for x = 0.4. Moreover, electrical transport measurements reveal a considerable decrease in resistivity for Cu doped samples compared to undoped samples, which indicates the increase in charge carrier concentration with increasing Cu content.
  • Journal article
    Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Bergauer T, Chatterjee S, Damanakis K, Dragicevic M, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Mikulec I, Schieck J, Schöfbeck R, Schwarz D, Sonawane M, Templ S, Waltenberger W, Wulz C-E, Darwish MR, Janssen T, Van Laer T, Van Mechelen P, Breugelmans N, DHondt J, Dansana S, De Moor A, Delcourt M, Heyen F, Lowette S, Makarenko I, Müller D, Tavernier S, Tytgat M, Van Onsem GP, Van Putte S, Vannerom D, Bilin B, Clerbaux B, Das AK, De Lentdecker G, Evard H, Favart L, Gianneios P, Jaramillo J, Khalilzadeh A, Khan FA, Lee K, Mahdavikhorrami M, Malara A, Paredes S, Shahzad MA, Thomas L, Vanden Bemden M, Vander Velde C, Vanlaer P, De Coen M, Dobur D, Gokbulut G, Hong Y, Knolle J, Lambrecht L, Marckx D, Mota Amarilo K, Samalan A, Skovpen K, Van Den Bossche N, van der Linden J, Wezenbeek L, Benecke A, Bethani A, Bruno G, Caputo C, De Favereau De Jeneret J, Delaere C, Donertas IS, Giammanco A, Guzel AO, Jain S, Lemaitre V, Lidrych J, Mastrapasqua P, Tran TT, Wertz S, Alves GA, Alves Gallo Pereira M, Coelho E, Correia Silva G, Hensel C, Menezes De Oliveira T, Mora Herrera C, Moraes A, Rebello Teles P, Soeiro M, Vilela Pereira A, Aldá Júnior WL, Barroso Ferreira Filho M, Brandao Malbouisson H, Carvalho W, Chinellato J, Da Costa EM, Da Silveira GG, De Jesus Damiao D, Fonseca De Souza S, Gomes De Souza R, Macedo M, Martins J, Mundim L, Nogima H, Pinheiro JP, Santoro A, Sznajder A, Thiel M, Bernardes CA, Calligaris L, Fernandez Perez Tomei TR, Gregores EM, Lopes Da Costa B, Maietto Silverio I, Mercadante PG, Novaes SF, Orzari B, Padula SS, Aleksandrov A, Antchev G, Hadjiiska R, Iaydjiev P, Misheva M, Shopova M, Sultanov G, Dimitrov A, Litov L, Pavlov B, Petkov P, Petrov A, Shumka E, Keshri S, Thakur S, Cheng T, Javaid T, Yuan L, Hu Z, Liang Z, Liu J, Yi K, Chen GM, Chen HS, Chen M, Iemmi F, Jiang CH, Kapoor A, Liao H, Liu Z-A, Sharma R, Song JN, Tao J, Wang C, Wang J, Wang Z, Zhang H, Zhao J, Agapitos A, Ban Y, Deng S, Guo Bet al., 2024,

    Model-independent search for pair production of new bosons decaying into muons in proton-proton collisions at $$ \sqrt{s} $$ = 13 TeV

    , Journal of High Energy Physics, Vol: 2024

    <jats:title>A<jats:sc>bstract</jats:sc> </jats:title> <jats:p>The results of a model-independent search for the pair production of new bosons within a mass range of 0<jats:italic>.</jats:italic>21 <jats:italic>&lt; m &lt;</jats:italic> 60 GeV, are presented. This study utilizes events with a four-muon final state. We use two data sets, comprising 41<jats:italic>.</jats:italic>5 fb<jats:sup> <jats:italic>−</jats:italic>1</jats:sup> and 59<jats:italic>.</jats:italic>7 fb<jats:sup> <jats:italic>−</jats:italic>1</jats:sup> of proton-proton collisions at <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$ \sqrt{s} $$</jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> </mml:math> </jats:alternatives> </jats:inline-formula> = 13 TeV, recorded in 2017 and 2018 by the CMS experiment at the CERN LHC. The study of the 2018 data set includes a search for displaced signatures of a new boson within the proper decay length range of 0 <jats:italic>&lt; cτ &lt;</jats:italic> 100 mm. Our results are combined with a previous CMS result, based on 35<jats:italic>.</jats:italic>9 fb<jats:sup> <jats:italic>−</jats:italic>1</jats:sup> of proton-proton collisions at <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$ \sqrt{s} $$</jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt>
  • Journal article
    Aaij R, Abdelmotteleb ASW, Abellan Beteta C, Abudinén F, Ackernley T, Adefisoye AA, Adeva B, Adinolfi M, Adlarson P, Agapopoulou C, Aidala CA, Ajaltouni Z, Akar S, Akiba K, Albicocco P, Albrecht J, Alessio F, Alexander M, Aliouche Z, Alvarez Cartelle P, Amalric R, Amato S, Amey JL, Amhis Y, An L, Anderlini L, Andersson M, Andreianov A, Andreola P, Andreotti M, Andreou D, Anelli A, Ao D, Archilli F, Argenton M, Arguedas Cuendis S, Artamonov A, Artuso M, Aslanides E, Ataíde Da Silva R, Atzeni M, Audurier B, Bacher D, Bachiller Perea I, Bachmann S, Bachmayer M, Back JJ, Baladron Rodriguez P, Balagura V, Baldini W, Balzani L, Bao H, Baptista de Souza Leite J, Barbero Pretel C, Barbetti M, Barbosa IR, Barlow RJ, Barnyakov M, Barsuk S, Barter W, Bartolini M, Bartz J, Basels JM, Bashir S, Bassi G, Batsukh B, Battista PB, Bay A, Beck A, Becker M, Bedeschi F, Bediaga IB, Behling NB, Belin S, Bellee V, Belous K, Belov I, Belyaev I, Benane G, Bencivenni G, Ben-Haim E, Berezhnoy A, Bernet R, Bernet Andres S, Bertolin A, Betancourt C, Betti F, Bex J, Bezshyiko I, Bhom J, Bieker MS, Biesuz NV, Billoir P, Biolchini A, Birch M, Bishop FCR, Bitadze A, Bizzeti A, Blake T, Blanc F, Blank JE, Blusk S, Bocharnikov V, Boelhauve JA, Boente Garcia O, Boettcher T, Bohare A, Boldyrev A, Bolognani CS, Bolzonella R, Bondar N, Bordelius A, Borgato F, Borghi S, Borsato M, Borsuk JT, Bouchiba SA, Bovill M, Bowcock TJV, Boyer A, Bozzi C, Brea Rodriguez A, Breer N, Brodzicka J, Brossa Gonzalo A, Brown J, Brundu D, Buchanan E, Buonaura A, Buonincontri L, Burke AT, Burr C, Butkevich A, Butter JS, Buytaert J, Byczynski W, Cadeddu S, Cai H, Caillet AC, Calabrese R, Calderon Ramirez S, Calefice L, Cali S, Calvi M, Calvo Gomez M, Camargo Magalhaes P, Cambon Bouzas JI, Campana P, Campora Perez DH, Campos AC, Campoverde Quezada AF, Capelli S, Capriotti L, Caravaca-Mora R, Carbone A, Carcedo Salgado L, Cardinale R, Cardini A, Carniti P, Carus L, Casais Vidal A, Caspary R, Casse G, Castro Godinez J, Cattaneoet al., 2024,

    Measurement of CP Violation Observables in D^{+}→K^{-}K^{+}π^{+} Decays.

    , Phys Rev Lett, Vol: 133

    A search for violation of the charge-parity (CP) symmetry in the D^{+}→K^{-}K^{+}π^{+} decay is presented, with proton-proton collision data corresponding to an integrated luminosity of 5.4  fb^{-1}, collected at a center-of-mass energy of 13 TeV with the LHCb detector. A novel model-independent technique is used to compare the D^{+} and D^{-} phase-space distributions, with instrumental asymmetries subtracted using the D_{s}^{+}→K^{-}K^{+}π^{+} decay as a control channel. The p value for the hypothesis of CP conservation is 8.1%. The CP asymmetry observables A_{CP|S}^{ϕπ^{+}}=(0.95±0.43_{stat}±0.26_{syst})×10^{-3} and A_{CP|S}^{K[over ¯]^{*0}K^{+}}=(-0.26±0.56_{stat}±0.18_{syst})×10^{-3} are also measured. These results show no evidence of CP violation and represent the most sensitive search performed through the phase space of a multibody decay.
  • Journal article
    Mazumdar D, Das K, Das I, 2024,

    Magnetic exchange coupled composite behavior in the doped manganite nanoparticles: A proposed phenomenological model

    , Physica B: Condensed Matter, Vol: 695, ISSN: 0921-4526

    In this paper, we comprehensively investigate the isothermal magnetization behavior of doped perovskite manganite nanoparticles. The focus is on understanding the impact of variation of particle sizes on the soft and hard magnetic phases with respect to the changes in the coercive field and remanent magnetization, both theoretically and experimentally. The study seeks to correlate experimental findings with the proposed phenomenological model to gain deeper insights into the underlying mechanisms governing exchange coupling and anisotropy effects in the nanocrystalline composites. The proposed phenomenological model beautifully demonstrates how the values of saturation magnetization and coercive field changes with changing the particle size in the nanocrystalline La0.48Ca0.52MnO3 (LCMO48) and La0.46Ca0.54MnO3 (LCMO46) compounds. In addition, the model provide an insights into the limitations of critical radius, size and shape of the nanocrystalline particle. This investigation looks into how the size of particles affects their magnetic properties, specifically coercive field and remanent magnetization.
  • Journal article
    Das K, Mazumdar D, Das I, 2024,

    Structural distortion driven polaronic transport and table-like magnetocaloric properties in polycrystalline Tb0.7Sr0.3MnO3 compound.

    , Phys Chem Chem Phys, Vol: 26, Pages: 29987-30001

    This research mainly explores the structural, magnetic, magneto-transport, and magnetocaloric properties of the polycrystalline Tb0.7Sr0.3MnO3 compound. The results reveal a significant modification of the compound's ground state with increasing the strength of the magnetic field. The strong distortion in the crystal structure highly controls the magnetic and magneto-transport properties of the system. Along with this, a prominent 'table-like' nature in the temperature-dependent magnetic entropy change has been noticed, showcasing the potential application of the compound in the field of Ericsson refrigeration technology. Notably, a substantial low-field magnetoresistance is noticed around T ∼ 60 K. The temperature dependent electrical resistivity data can be well explained with the help of polaronic transport conduction mechanisms namely small-polaron hopping and variable-range hopping models. Various significant parameters are calculated and the system possesses a non-adiabatic polaron hopping mechanism with a large electron-phonon coupling constant. This investigation contributes valuable insights into the intricate dynamics of the 3d-4f exchange interaction and crystallographic distortion, shedding light on the underlying mechanisms governing the magnetic and electrical transport properties of the Sr-doped TbMnO3 compound.
  • Journal article
    Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Bergauer T, Chatterjee S, Damanakis K, Dragicevic M, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Mikulec I, Schieck J, Schöfbeck R, Schwarz D, Sonawane M, Templ S, Waltenberger W, Wulz C-E, Darwish MR, Janssen T, Laer TV, Mechelen PV, Breugelmans N, DHondt J, Dansana S, De Moor A, Delcourt M, Heyen F, Lowette S, Makarenko I, Müller D, Tavernier S, Tytgat M, Onsem GPV, Van Putte S, Vannerom D, Bilin B, Clerbaux B, Das AK, De Lentdecker G, Evard H, Favart L, Gianneios P, Jaramillo J, Khalilzadeh A, Khan FA, Lee K, Mahdavikhorrami M, Malara A, Paredes S, Shahzad MA, Thomas L, Bemden MV, Velde CV, Vanlaer P, De Coen M, Dobur D, Gokbulut G, Hong Y, Knolle J, Lambrecht L, Marckx D, Amarilo KM, Samalan A, Skovpen K, Bossche NVD, Linden JVD, Wezenbeek L, Benecke A, Bethani A, Bruno G, Caputo C, De Favereau De Jeneret J, Delaere C, Donertas IS, Giammanco A, Guzel AO, Jain S, Lemaitre V, Lidrych J, Mastrapasqua P, Tran TT, Wertz S, Alves GA, Pereira MAG, Coelho E, Silva GC, Hensel C, De Oliveira TM, Herrera CM, Moraes A, Teles PR, Soeiro M, Pereira AV, Júnior WLA, Filho MBF, Malbouisson HB, Carvalho W, Chinellato J, Da Costa EM, Da Silveira GG, De Jesus Damiao D, De Souza SF, De Souza RG, Macedo M, Martins J, Mundim L, Nogima H, Pinheiro JP, Santoro A, Sznajder A, Thiel M, Bernardes CA, Calligaris L, Tomei TRFP, Gregores EM, Da Costa BL, Silverio IM, Mercadante PG, Novaes SF, Orzari B, Padula SS, Aleksandrov A, Antchev G, Hadjiiska R, Iaydjiev P, Misheva M, Shopova M, Sultanov G, Dimitrov A, Litov L, Pavlov B, Petkov P, Petrov A, Shumka E, Keshri S, Thakur S, Cheng T, Javaid T, Yuan L, Hu Z, Liang Z, Liu J, Yi K, Chen GM, Chen HS, Chen M, Iemmi F, Jiang CH, Kapoor A, Liao H, Liu Z-A, Sharma R, Song JN, Tao J, Wang C, Wang J, Wang Z, Zhang H, Zhao J, Agapitos A, Ban Y, Deng S, Guo B, Jiang C, Levin A, Li C, Li Q, Mao Y, Qian S, Qian SJ, Qin X, Sun X, Wang D, Yang H, Zhang L, Zhao Y, Zhou C, Yang S, You Z, Jaffel K, Lu Net al., 2024,

    Search for CP violation in $${{{\textrm{D}}}^{{0}}} \rightarrow {{\textrm{K}} _{\text {S}}^{{0}}} {{\textrm{K}} _{\text {S}}^{{0}}} $$ decays in proton–proton collisions at $$\sqrt{s} = 13\,\text {Te}\hspace{-.08em}\text {V} $$

    , The European Physical Journal C, Vol: 84

    <jats:title>Abstract</jats:title> <jats:p>A search is reported for charge-parity <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$CP$$</jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>CP</mml:mi> </mml:mrow> </mml:math> </jats:alternatives> </jats:inline-formula> violation in <jats:inline-formula> <jats:alternatives> <jats:tex-math>$${{{\textrm{D}}}^{{0}}} \rightarrow {{\textrm{K}} _{\text {S}}^{{0}}} {{\textrm{K}} _{\text {S}}^{{0}}} $$</jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msup> <mml:mrow> <mml:mtext>D</mml:mtext> </mml:mrow> <mml:mn>0</mml:mn> </mml:msup> <mml:mo>→</mml:mo> <mml:msubsup> <mml:mtext>K</mml:mtext> <mml:mrow> <mml:mtext>S</mml:mtext> </mml:mrow> <mml:mn>0</mml:mn> </mml:msubsup> <mml:msubsup> <mml:mtext>K</mml:mtext> <mml:mrow> <mml:mtext>S</mml:mtext> </mml:mrow> <mml:mn>0</mml:mn> </mml:msubsup> </mml:mrow> </mml:math> </jats:alternati
  • Journal article
    Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Benato L, Bergauer T, Chatterjee S, Damanakis K, Dragicevic M, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Mikulec I, Schieck J, Schöfbeck R, Schwarz D, Sonawane M, Waltenberger W, Wulz CE, Janssen T, Van Laer T, Van Mechelen P, Breugelmans N, DHondt J, Dansana S, De Moor A, Delcourt M, Heyen F, Lowette S, Makarenko I, Müller D, Tavernier S, Tytgat M, Van Onsem GP, Van Putte S, Vannerom D, Bilin B, Clerbaux B, Das AK, De Bruyn I, De Lentdecker G, Evard H, Favart L, Gianneios P, Jaramillo J, Khalilzadeh A, Khan FA, Lee K, Malara A, Paredes S, Shahzad MA, Thomas L, Vanden Bemden M, Vander Velde C, Vanlaer P, De Coen M, Dobur D, Gokbulut G, Hong Y, Knolle J, Lambrecht L, Marckx D, Mota Amarilo K, Skovpen K, Van Den Bossche N, van der Linden J, Wezenbeek L, Benecke A, Bethani A, Bruno G, Caputo C, De Favereau De Jeneret J, Delaere C, Donertas IS, Giammanco A, Guzel AO, Jain S, Lemaitre V, Lidrych J, Mastrapasqua P, Tran TT, Turkcapar S, Alves GA, Coelho E, Correia Silva G, Hensel C, Menezes De Oliveira T, Mora Herrera C, Rebello Teles P, Soeiro M, Tonelli Manganote EJ, Vilela Pereira A, Aldá Júnior WL, Barroso Ferreira Filho M, Brandao Malbouisson H, Carvalho W, Chinellato J, Da Costa EMet al., 2024,

    Measurements of polarization and spin correlation and observation of entanglement in top quark pairs using (Formula presented) events from proton-proton collisions at (Formula presented)

    , Physical Review D, Vol: 110, ISSN: 2470-0010

    Measurements of the polarization and spin correlation in top quark pairs ((Formula presented)) are presented using events with a single electron or muon and jets in the final state. The measurements are based on proton-proton collision data from the LHC at (Formula presented) collected by the CMS experiment, corresponding to an integrated luminosity of (Formula presented). All coefficients of the polarization vectors and the spin correlation matrix are extracted simultaneously by performing a binned likelihood fit to the data. The measurement is performed inclusively and in bins of additional observables, such as the mass of the (Formula presented) system and the top quark scattering angle in the (Formula presented) rest frame. The measured polarization and spin correlation are in agreement with the standard model. From the measured spin correlation, conclusions on the (Formula presented) spin entanglement are drawn by applying the Peres-Horodecki criterion. The standard model predicts entangled spins for (Formula presented) states at the production threshold and at high masses of the (Formula presented) system. Entanglement is observed for the first time in events at high (Formula presented) mass, where a large fraction of the (Formula presented) decays are spacelike separated, with an expected and observed significance of above 5 standard deviations.
  • Journal article
    Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Bergauer T, Chatterjee S, Damanakis K, Dragicevic M, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Mikulec I, Schieck J, Schöfbeck R, Schwarz D, Sonawane M, Templ S, Waltenberger W, Wulz CE, Darwish MR, Janssen T, Van Mechelen P, Bols ES, DHondt J, Dansana S, De Moor A, Delcourt M, El Faham H, Lowette S, Makarenko I, Müller D, Tavernier S, Tytgat M, Van Onsem GP, Van Putte S, Vannerom D, Clerbaux B, Das AK, De Lentdecker G, Evard H, Favart L, Gianneios P, Hohov D, Jaramillo J, Khalilzadeh A, Khan FA, Lee K, Mahdavikhorrami M, Malara A, Paredes S, Thomas L, Vanden Bemden M, Vander Velde C, Vanlaer P, De Coen M, Dobur D, Hong Y, Knolle J, Lambrecht L, Mestdach G, Mota Amarilo K, Rendón C, Samalan A, Skovpen K, Van Den Bossche N, van der Linden J, Wezenbeek L, Benecke A, Bethani A, Bruno G, Caputo C, Delaere C, Donertas IS, Giammanco A, Jain S, Lemaitre V, Lidrych J, Mastrapasqua P, Mondal K, Tran TT, Wertz S, Alves GA, Coelho E, Hensel C, Menezes De Oliveira T, Moraes A, Rebello Teles P, Soeiro M, Aldá Júnior WL, Alves Gallo Pereira M, Barroso Ferreira Filho M, Brandao Malbouisson H, Carvalho W, Chinellato J, Da Costa EM, Da Silveira GG, De Jesus Damiao D, Fonseca De Souza Set al., 2024,

    Measurement of boosted Higgs bosons produced via vector boson fusion or gluon fusion in the H →bb¯ decay mode using LHC proton-proton collision data at s = 13 TeV

    , Journal of High Energy Physics, Vol: 2024

    A measurement is performed of Higgs bosons produced with high transverse momentum (pT) via vector boson or gluon fusion in proton-proton collisions. The result is based on a data set with a center-of-mass energy of 13 TeV collected in 2016–2018 with the CMS detector at the LHC and corresponds to an integrated luminosity of 138 fb−1. The decay of a high-pT Higgs boson to a boosted bottom quark-antiquark pair is selected using large-radius jets and employing jet substructure and heavy-flavor taggers based on machine learning techniques. Independent regions targeting the vector boson and gluon fusion mechanisms are defined based on the topology of two quark-initiated jets with large pseudorapidity separation. The signal strengths for both processes are extracted simultaneously by performing a maximum likelihood fit to data in the large-radius jet mass distribution. The observed signal strengths relative to the standard model expectation are 4.9−1.6+1.9 and 1.6−1.5+1.7 for the vector boson and gluon fusion mechanisms, respectively. A differential cross section measurement is also reported in the simplified template cross section framework.
  • Journal article
    Abbaneo D, Ahmad S, Albanese R, Alexandrov A, Alicante F, Androsov K, Anokhina A, Asada T, Asawatangtrakuldee C, Ayala Torres MA, Battilana C, Bay A, Bertocco A, Betancourt C, Bick D, Biswas R, Blanco Castro A, Boccia V, Bogomilov M, Bonacorsi D, Bonivento WM, Bordalo P, Boyarsky A, Buontempo S, Campanelli M, Camporesi T, Canale V, Castro A, Centanni D, Cerutti F, Chernyavskiy M, Choi KY, Cholak S, Cindolo F, Climescu M, Conaboy AP, Dallavalle GM, Davino D, de Bryas PT, De Lellis G, De Magistris M, De Roeck A, De Rújula A, De Simone D, Di Crescenzo A, Di Ferdinando D, Dinc C, Donà R, Durhan O, Fabbri F, Fedotovs F, Ferrillo M, Fiorillo A, Fresa R, Funk W, Garay Walls FM, Golovatiuk A, Golutvin A, Graverini E, Guler AM, Guliaeva V, Haefeli GJ, Hagner C, Helo Herrera JC, van Herwijnen E, Iengo P, Ilieva S, Infantino A, Iuliano A, Jacobsson R, Kamiscioglu C, Kauniskangas AM, Khalikov E, Kim SH, Kim YG, Klioutchnikov G, Komatsu M, Konovalova N, Kuleshov S, Krzempek L, Lacker HM, Lantwin O, Lasagni Manghi F, Lauria A, Lee KY, Lee KS, Lo Meo S, Loschiavo VP, Marcellini S, Margiotta A, Mascellani A, Mei F, Miano A, Mikulenko A, Montesi MC, Navarria FL, Nuntiyakul W, Ogawa S, Okateva N, Ovchynnikov Met al., 2024,

    An integrated flux-symmetric spectrometer-magnet system for the SND@LHC experiment upgrade

    , Journal of Instrumentation, Vol: 19

    The proposed upgrade of the SND@LHC experiment for the High Luminosity phase of the LHC (HL-LHC) will strongly benefit from the presence of a magnetized region, allowing for muon momentum and charge measurement. In this paper we describe an iron core magnet system that is partly integrated with the calorimeter and that is designed to respect the strict constraints from the available space in the experimental cavern, power consumption, and field requirements. Semi-analytical tools are introduced to explore the parameter space, in order to define the primary design options. A full 3-D analysis is then performed in order to validate the optimal choice, and to propose a conceptual design, including sizing of the components, detector performances and stray fields. Several technical options are also discussed, anticipating the design phase.
  • Journal article
    Abed Abud A, Abi B, Acciarri R, Acero MA, Adames MR, Adamov G, Adamowski M, Adams D, Adinolfi M, Adriano C, Aduszkiewicz A, Aguilar J, Akbar F, Allison K, Alonso Monsalve S, Alrashed M, Alton A, Alvarez R, Alves T, Amar H, Amedo P, Anderson J, Andreopoulos C, Andreotti M, Andrews MP, Andrianala F, Andringa S, Anfimov N, Ankowski A, Antic D, Antoniassi M, Antonova M, Antoshkin A, Aranda-Fernandez A, Arellano L, Arrieta Diaz E, Arroyave MA, Asaadi J, Ashkenazi A, Asner DM, Asquith L, Atkin E, Auguste D, Aurisano A, Aushev V, Autiero D, Azam MB, Azfar F, Back A, Back H, Back JJ, Bagaturia I, Bagby L, Balashov N, Balasubramanian S, Baldi P, Baldini W, Baldonedo J, Baller B, Bambah B, Banerjee R, Barao F, Barbu D, Barenboim G, Barham Alzás P, Barker GJ, Barkhouse W, Barr G, Barranco Monarca J, Barros A, Barros N, Barrow D, Barrow JL, Basharina-Freshville A, Bashyal A, Basque V, Batchelor C, Bathe-Peters L, Battat JBR, Battisti F, Bay F, Bazetto MCQ, Bazo Alba JLL, Beacom JF, Bechetoille E, Behera B, Belchior E, Bell G, Bellantoni L, Bellettini G, Bellini V, Beltramello O, Benekos N, Benitez Montiel C, Benjamin D, Bento Neves F, Berger J, Berkman S, Bernal J, Bernardini Pet al., 2024,

    DUNE Phase II: scientific opportunities, detector concepts, technological solutions

    , Journal of Instrumentation, Vol: 19

    The international collaboration designing and constructing the Deep Underground Neutrino Experiment (DUNE) at the Long-Baseline Neutrino Facility (LBNF) has developed a two-phase strategy toward the implementation of this leading-edge, large-scale science project. The 2023 report of the US Particle Physics Project Prioritization Panel (P5) reaffirmed this vision and strongly endorsed DUNE Phase I and Phase II, as did the European Strategy for Particle Physics. While the construction of the DUNE Phase I is well underway, this White Paper focuses on DUNE Phase II planning. DUNE Phase-II consists of a third and fourth far detector (FD) module, an upgraded near detector complex, and an enhanced 2.1 MW beam. The fourth FD module is conceived as a "Module of Opportunity", aimed at expanding the physics opportunities, in addition to supporting the core DUNE science program, with more advanced technologies. This document highlights the increased science opportunities offered by the DUNE Phase II near and far detectors, including long-baseline neutrino oscillation physics, neutrino astrophysics, and physics beyond the standard model. It describes the DUNE Phase II near and far detector technologies and detector design concepts that are currently under consideration. A summary of key R & D goals and prototyping phases needed to realize the Phase II detector technical designs is also provided. DUNE's Phase II detectors, along with the increased beam power, will complete the full scope of DUNE, enabling a multi-decadal program of groundbreaking science with neutrinos.
  • Journal article
    Aaij R, Abdelmotteleb ASW, Abellan Beteta C, Abudinén F, Ackernley T, Adefisoye AA, Adeva B, Adinolfi M, Adlarson P, Agapopoulou C, Aidala CA, Ajaltouni Z, Akar S, Akiba K, Albicocco P, Albrecht J, Alessio F, Alexander M, Aliouche Z, Cartelle PA, Amalric R, Amato S, Amey JL, Amhis Y, An L, Anderlini L, Andersson M, Andreianov A, Andreola P, Andreotti M, Andreou D, Anelli A, Ao D, Archilli F, Argenton M, Cuendis SA, Artamonov A, Artuso M, Aslanides E, Da Silva RA, Atzeni M, Audurier B, Bacher D, Bachiller Perea I, Bachmann S, Bachmayer M, Back JJ, Rodriguez PB, Balagura V, Baldini W, Balzani L, Bao H, de Souza Leite JB, Pretel CB, Barbetti M, Barbosa IR, Barlow RJ, Barnyakov M, Barsuk S, Barter W, Bartolini M, Bartz J, Basels JM, Bashir S, Bassi G, Batsukh B, Battista PB, Bay A, Beck A, Becker M, Bedeschi F, Bediaga IB, Behling NA, Belin S, Bellee V, Belous K, Belov I, Belyaev I, Benane G, Bencivenni G, Ben-Haim E, Berezhnoy A, Bernet R, Andres SB, Bertolin A, Betancourt C, Betti F, Bex J, Bezshyiko I, Bhom J, Bieker MS, Biesuz NV, Billoir P, Biolchini A, Birch M, Bishop FCR, Bitadze A, Bizzeti A, Blake T, Blanc Fet al., 2024,

    Analysis of Λ0b→ pK−μ+μ− decays

    , Journal of High Energy Physics, Vol: 2024

    The differential branching fraction and angular coefficients of Formula Presented decays are measured in bins of the dimuon mass squared and dihadron mass. The analysis is performed using a data set corresponding to 9 fb−1 of integrated luminosity collected with the LHCb detector between 2011 and 2018. The data are consistent with receiving contributions from a mixture of Λ resonances with different spin-parity quantum numbers. The angular coefficients show a pattern of vector-axial vector interference that is a characteristic of the type of flavour-changing neutral-current transition relevant for these decays.
  • Journal article
    Zunica G, Zuliani D, Zou Q, Zhuo J, Zhukov V, Zhu X, Zhu X, Zhu LZ, Zhovkovska V, Zhou Y, Zhou X, Zhou T, Zheng Y, Zheng XZ, Zhelezov A, Zharkova A, Zhao Y, Zhang YZ, Zhang Y, Zhang S, Zhang S, Zhang L, Zhang J, Zhang D, Zhang C, Zeng M, Zeng C, Zdybal M, Zavertyaev M, Zaffaroni E, Yuan X, Yu J, Yu CY, Yin H, Yeung H, Yeroshenko V, Yang Z, Yang Z, Yang Y, Yang X, Yang S, Yang D, Xu Z, Xu Z, Xu Z, Xu M, Xu L, Xu L, Xu J, Xu A, Xie Y, Xiang Z, Xian S, Wyllie K, Wu Z, Wu Y, Wu J, Wu H, Wotton SA, Wormser G, Wong CP, Witola L, Witek M, Wislicki W, Wilson FF, Williams R, Williams MRJ, Williams M, Wilkinson MK, Wilkinson G, Wiedner D, Wiederhold AR, Whitehead M, White DJ, Westhenry BDC, Wendel J, Wei Y, Websdale D, Watson NK, Waterlaat M, Ward JA, Wang Z, Wang Z, Wang Z, Wang XW, Wang X, Wang X, Wang R, Wang NW, Wang M, Wang J, Wang J, Wang J, Wang J, Wang G, Wang C, Wan G, Walton EJ, Walsh J, Wagner Jet al., 2024,

    Study of charmonium production via the decay to pp¯ at √s=13TeV

    , European Physical Journal C, Vol: 84, ISSN: 1434-6044

    Charmonium production cross-section in proton–proton collisions is measured at the centre-of-mass energy s=13TeV using decays to pp¯ final state. The study is performed using a data sample corresponding to an integrated luminosity of 2.2fb-1 collected in 2018 with the LHCb detector. The production cross-section of the ηc meson is measured in a rapidity range of 2.0<y<4.0 and in a transverse momentum range of 5.0<pT<20.0GeV/c, which is extended compared with previous LHCb analyses. The differential cross-section is measured in bins of pT and, for the first time, of y. Upper limits, at 90% and 95% confidence levels, on the ηc(2S) and hc(1P) prompt production cross-sections are determined for the first time.
  • Journal article
    Taniuchi N, Abe K, Abe S, Asaoka Y, Bronner C, Harada M, Hayato Y, Hiraide K, Hosokawa K, Ieki K, Ikeda M, Kameda J, Kanemura Y, Kaneshima R, Kashiwagi Y, Kataoka Y, Miki S, Mine S, Miura M, Moriyama S, Nakahata M, Nakayama S, Noguchi Y, Pronost G, Okamoto K, Sato K, Sekiya H, Shiba H, Shimizu K, Shiozawa M, Sonoda Y, Suzuki Y, Takeda A, Takemoto Y, Takenaka A, Tanaka H, Watanabe S, Yano T, Kajita T, Okumura K, Tashiro T, Tomiya T, Wang X, Yoshida S, Megias GD, Fernandez P, Labarga L, Ospina N, Zaldivar B, Pointon BW, Kearns E, Mirabito J, Raaf JL, Wan L, Wester T, Bian J, Griskevich NJ, Kropp WR, Locke S, Smy MB, Sobel HW, Takhistov V, Yankelevich A, Hill J, Jang MC, Kim JY, Lee SH, Lim IT, Moon DH, Park RG, Yang BS, Bodur B, Scholberg K, Walter CW, Beauchêne A, Bernard L, Coffani A, Drapier O, El Hedri S, Giampaolo A, Mueller TA, Santos AD, Paganini P, Rogly R, Nakamura T, Jang JS, Machado LN, Learned JG, Choi K, Iovine N, Cao S, Anthony LHV, Martin D, Prouse NW, Scott M, Sztuc AA, Uchida Y, Berardi V, Calabria NF, Catanesi MGet al., 2024,

    Search for proton decay via p →e+η and p →μ+η with a 0.37 Mton-year exposure of Super-Kamiokande

    , Physical Review D, Vol: 110, ISSN: 2470-0010

    A search for proton decay into e+/μ+ and a η meson has been performed using data from a 0.373 Mton·year exposure (6050.3 live days) of Super-Kamiokande. Compared to previous searches this work introduces an improved model of the intranuclear η interaction cross section, resulting in a factor of 2 reduction in uncertainties from this source and ∼10% increase in signal efficiency. No significant data excess was found above the expected number of atmospheric neutrino background events resulting in no indication of proton decay into either mode. Lower limits on the proton partial lifetime of 1.4×1034 years for p→e+η and 7.3×1033 years for p→μ+η at the 90% CL were set. These limits are around 1.5 times longer than our previous study and are the most stringent to date.
  • Journal article
    Aaij R, Abdelmotteleb ASW, Abellan Beteta C, Abudinén F, Ackernley T, Adefisoye AA, Adeva B, Adinolfi M, Adlarson P, Agapopoulou C, Aidala CA, Ajaltouni Z, Akar S, Akiba K, Albicocco P, Albrecht J, Alessio F, Alexander M, Aliouche Z, Alvarez Cartelle P, Amalric R, Amato S, Amey JL, Amhis Y, An L, Anderlini L, Andersson M, Andreianov A, Andreola P, Andreotti M, Andreou D, Anelli A, Ao D, Archilli F, Argenton M, Arguedas Cuendis S, Artamonov A, Artuso M, Aslanides E, Ataíde Da Silva R, Atzeni M, Audurier B, Bacher D, Bachiller Perea I, Bachmann S, Bachmayer M, Back JJ, Baladron Rodriguez P, Balagura V, Baldini W, Balzani L, Bao H, Baptista de Souza Leite J, Barbero Pretel C, Barbetti M, Barbosa IR, Barlow RJ, Barnyakov M, Barsuk S, Barter W, Bartolini M, Bartz J, Basels JM, Bashir S, Bassi G, Batsukh B, Battista PB, Bay A, Beck A, Becker M, Bedeschi F, Bediaga IB, Behling NA, Belin S, Bellee V, Belous K, Belov I, Belyaev I, Benane G, Bencivenni G, Ben-Haim E, Berezhnoy A, Bernet R, Bernet Andres S, Bertolin A, Betancourt C, Betti F, Bex J, Bezshyiko I, Bhom J, Bieker MS, Biesuz NV, Billoir P, Biolchini A, Birch M, Bishop FCR, Bitadze A, Bizzeti A, Blake T, Blanc Fet al., 2024,

    Measurement of the effective leptonic weak mixing angle

    , Journal of High Energy Physics, Vol: 2024

    Using pp collision data at s = 13 TeV, recorded by the LHCb experiment between 2016 and 2018 and corresponding to an integrated luminosity of 5.4 fb−1, the forward-backward asymmetry in the pp → Z/γ* → μ+μ− process is measured. The measurement is carried out in ten intervals of the difference between the muon pseudorapidities, within a fiducial region covering dimuon masses between 66 and 116 GeV, muon pseudorapidities between 2.0 and 4.5 and muon transverse momenta above 20 GeV. These forward-backward asymmetries are compared with predictions, at next-to-leading order in the strong and electroweak couplings. The measured effective leptonic weak mixing angle is (Formula presented.) where the first uncertainty is statistical, the second arises from systematic uncertainties associated with the asymmetry measurement, and the third arises from uncertainties in the fit model used to extract sin2θeffℓ from the asymmetry measurement. This result is based on an arithmetic average of results using the CT18, MSHT20, and NNPDF31 parameterisations of the proton internal structure, and is consistent with previous measurements and with predictions from the global electroweak fit.
  • Journal article
    Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Bergauer T, Chatterjee S, Damanakis K, Dragicevic M, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Mikulec I, Schieck J, Schöfbeck R, Schwarz D, Sonawane M, Templ S, Waltenberger W, Wulz C-E, Darwish MR, Janssen T, Mechelen PV, Bols ES, DHondt J, Dansana S, De Moor A, Delcourt M, Faham HE, Lowette S, Makarenko I, Müller D, Sahasransu AR, Tavernier S, Tytgat M, Onsem GPV, Putte SV, Vannerom D, Clerbaux B, Das AK, De Lentdecker G, Favart L, Gianneios P, Hohov D, Jaramillo J, Khalilzadeh A, Khan FA, Lee K, Mahdavikhorrami M, Malara A, Paredes S, Thomas L, Bemden MV, Velde CV, Vanlaer P, De Coen M, Dobur D, Hong Y, Knolle J, Lambrecht L, Mestdach G, Amarilo KM, Rendón C, Samalan A, Skovpen K, Bossche NVD, Linden JVD, Wezenbeek L, Benecke A, Bethani A, Bruno G, Caputo C, Delaere C, Donertas IS, Giammanco A, Jaffel K, Jain S, Lemaitre V, Lidrych J, Mastrapasqua P, Mondal K, Tran TT, Wertz S, Alves GA, Coelho E, Hensel C, De Oliveira TM, Moraes A, Teles PR, Soeiro M, Júnior WLA, Pereira MAG, Filho MBF, Malbouisson HB, Carvalho W, Chinellato J, Da Costa EM, Da Silveira GG, De Jesus Damiao D, De Souza SF, De Souza RG, Martins J, Herrera CM, Mundim L, Nogima H, Pinheiro JP, Santoro A, Sznajder A, Thiel M, Pereira AV, Bernardes CA, Calligaris L, Tomei TRFP, Gregores EM, Mercadante PG, Novaes SF, Orzari B, Padula SS, Aleksandrov A, Antchev G, Hadjiiska R, Iaydjiev P, Misheva M, Shopova M, Sultanov G, Dimitrov A, Litov L, Pavlov B, Petkov P, Petrov A, Shumka E, Keshri S, Thakur S, Cheng T, Javaid T, Yuan L, Hu Z, Liu J, Yi K, Chen GM, Chen HS, Chen M, Iemmi F, Jiang CH, Kapoor A, Liao H, Liu Z-A, Sharma R, Song JN, Tao J, Wang C, Wang J, Wang Z, Zhang H, Agapitos A, Ban Y, Levin A, Li C, Li Q, Mao Y, Qian SJ, Sun X, Wang D, Yang H, Zhang L, Zhou C, You Z, Lu N, Bauer G, Gao X, Leggat D, Okawa H, Lin Z, Lu C, Xiao M, Avila C, Trujillo DAB, Cabrera A, Florez C, Fraga J, Vega JAR, Guisao JM, Ramirez F, Rodriguez M, Alvarez JDRet al., 2024,

    Portable acceleration of CMS computing workflows with coprocessors as a service

    , Computing and Software for Big Science, Vol: 8, ISSN: 2510-2036

    Computing demands for large scientific experiments, such as the CMS experiment at the CERN LHC, will increase dramatically in the next decades. To complement the future performance increases of software running on central processing units (CPUs), explorations of coprocessor usage in data processing hold great potential and interest. Coprocessors are a class of computer processors that supplement CPUs, often improving the execution of certain functions due to architectural design choices. We explore the approach of Services for Optimized Network Inference on Coprocessors (SONIC) and study the deployment of this as-a-service approach in large-scale data processing. In the studies, we take a data processing workflow of the CMS experiment and run the main workflow on CPUs, while offloading several machine learning (ML) inference tasks onto either remote or local coprocessors, specifically graphics processing units (GPUs). With experiments performed at Google Cloud, the Purdue Tier-2 computing center, and combinations of the two, we demonstrate the acceleration of these ML algorithms individually on coprocessors and the corresponding throughput improvement for the entire workflow. This approach can be easily generalized to different types of coprocessors and deployed on local CPUs without decreasing the throughput performance. We emphasize that the SONIC approach enables high coprocessor usage and enables the portability to run workflows on different types of coprocessors.
  • Journal article
    Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Bergauer T, Chatterjee S, Damanakis K, Dragicevic M, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Mikulec I, Schieck J, Schöfbeck R, Schwarz D, Sonawane M, Templ S, Waltenberger W, Wulz C-E, Darwish MR, Janssen T, Van Mechelen P, Breugelmans N, DHondt J, Dansana S, De Moor A, Delcourt M, Heyen F, Lowette S, Makarenko I, Müller D, Tavernier S, Tytgat M, Van Onsem GP, Van Putte S, Vannerom D, Clerbaux B, Das AK, De Lentdecker G, Evard H, Favart L, Gianneios P, Hohov D, Jaramillo J, Khalilzadeh A, Khan FA, Lee K, Mahdavikhorrami M, Malara A, Paredes S, Shahzad MA, Thomas L, Bemden MV, Velde CV, Vanlaer P, De Coen M, Dobur D, Gokbulut G, Hong Y, Knolle J, Lambrecht L, Marckx D, Mestdach G, Amarilo KM, Samalan A, Skovpen K, Van Den Bossche N, van der Linden J, Wezenbeek L, Benecke A, Bethani A, Bruno G, Caputo C, De Favereau De Jeneret J, Delaere C, Donertas IS, Giammanco A, Guzel AO, Jain S, Lemaitre V, Lidrych J, Mastrapasqua P, Tran TT, Wertz S, Alves GA, Pereira MAG, Coelho E, Silva GC, Hensel C, De Oliveira TM, Moraes A, Teles PR, Soeiro M, Pereira AV, Júnior WLA, Filho MBF, Malbouisson HB, Carvalho W, Chinellato J, Da Costa EM, Da Silveira GG, De Jesus Damiao D, De Souza SF, De Souza RG, Macedo M, Martins J, Herrera CM, Mundim L, Nogima H, Pinheiro JP, Santoro A, Sznajder A, Thiel M, Bernardes CA, Calligaris L, Tomei TRFP, Gregores EM, Silverio IM, Mercadante PG, Novaes SF, Orzari B, Padula SS, Aleksandrov A, Antchev G, Hadjiiska R, Iaydjiev P, Misheva M, Shopova M, Sultanov G, Dimitrov A, Litov L, Pavlov B, Petkov P, Petrov A, Shumka E, Keshri S, Thakur S, Cheng T, Javaid T, Yuan L, Hu Z, Liang Z, Liu J, Yi K, Chen GM, Chen HS, Chen M, Iemmi F, Jiang CH, Kapoor A, Liao H, Liu Z-A, Sharma R, Song JN, Tao J, Wang C, Wang J, Wang Z, Zhang H, Zhao J, Agapitos A, Ban Y, Deng S, Guo B, Jiang C, Levin A, Li C, Li Q, Mao Y, Qian S, Qian SJ, Qin X, Sun X, Wang D, Yang H, Zhang L, Zhao Y, Zhou C, Yang S, You Z, Jaffel Ket al., 2024,

    The CMS statistical analysis and combination tool: COMBINE

    , Computing and Software for Big Science, Vol: 8, ISSN: 2510-2036

    This paper describes the Combine software package used for statistical analyses by the CMS Collaboration. The package, originally designed to perform searches for a Higgs boson and the combined analysis of those searches, has evolved to become the statistical analysis tool presently used in the majority of measurements and searches performed by the CMS Collaboration. It is not specific to the CMS experiment, and this paper is intended to serve as a reference for users outside of the CMS Collaboration, providing an outline of the most salient features and capabilities. Readers are provided with the possibility to run Combine and reproduce examples provided in this paper using a publicly available container image. Since the package is constantly evolving to meet the demands of ever-increasing data sets and analysis sophistication, this paper cannot cover all details of Combine. However, the online documentation referenced within this paper provides an up-to-date and complete user guide.
  • Journal article
    Aalbers J, Akerib DS, Al Musalhi AK, Alder F, Amarasinghe CS, Ames A, Anderson TJ, Angelides N, Araújo HM, Armstrong JE, Arthurs M, Baker A, Balashov S, Bang J, Barillier EE, Bargemann JW, Beattie K, Benson T, Bhatti A, Biekert A, Biesiadzinski TP, Birch HJ, Bishop EJ, Blockinger GM, Boxer B, Brew CAJ, Brás P, Burdin S, Buuck M, Carmona-Benitez MC, Carter M, Chawla A, Chen H, Cherwinka JJ, Chin YT, Chott NI, Converse MV, Cottle A, Cox G, Curran D, Dahl CE, David A, Delgaudio J, Dey S, de Viveiros L, Di Felice L, Ding C, Dobson JEY, Druszkiewicz E, Eriksen SR, Fan A, Fearon NM, Fiorucci S, Flaecher H, Fraser ED, Fruth TMA, Gaitskell RJ, Geffre A, Genovesi J, Ghag C, Gibbons R, Gokhale S, Green J, van der Grinten MGD, Haiston JJ, Hall CR, Han S, Hartigan-O'Connor E, Haselschwardt SJ, Hernandez MA, Hertel SA, Heuermann G, Homenides GJ, Horn M, Huang DQ, Hunt D, Jacquet E, James RS, Johnson J, Kaboth AC, Kamaha AC, Kannichankandy M, Khaitan D, Khazov A, Khurana I, Kim JD, Kim J, Kingston J, Kirk R, Kodroff D, Korley L, Korolkova EV, Kraus H, Kravitz S, Kreczko L, Kudryavtsev VA, Leonard DS, Lesko KT, Levy C, Lin J, Lindote A, Linehan R, Lippincott WH, Lopes MI, Lorenzon W, Lu C, Luitz S, Majewski PA, Manalaysay A, Mannino RL, Maupin C, McCarthy ME, McDowell G, McKinsey DN, McLaughlin J, McLaughlin JB, McMonigle R, Miller EH, Mizrachi E, Monte A, Monzani ME, Morales Mendoza JD, Morrison E, Mount BJ, Murdy M, Murphy ASJ, Naylor A, Nelson HN, Neves F, Nguyen A, Nikoleyczik JA, Olcina I, Oliver-Mallory KC, Orpwood J, Palladino KJ, Palmer J, Pannifer NJ, Parveen N, Patton SJ, Penning B, Pereira G, Perry E, Pershing T, Piepke A, Qie Y, Reichenbacher J, Rhyne CA, Riffard Q, Rischbieter GRC, Riyat HS, Rosero R, Rushton T, Rynders D, Santone D, Sazzad ABMR, Schnee RW, Shaw S, Shutt T, Silk JJ, Silva C, Sinev G, Siniscalco J, Smith R, Solovov VN, Sorensen P, Soria J, Stancu I, Stevens A, Stifter K, Suerfu B, Sumner TJ, Szydagis M, Taylor WC, Tiedt DR, Timalsina M, Tong Z, Tovey Det al., 2024,

    Constraints on Covariant Dark-Matter-Nucleon Effective Field Theory Interactions from the First Science Run of the LUX-ZEPLIN Experiment.

    , Phys Rev Lett, Vol: 133

    The LUX-ZEPLIN (LZ) experiment is a dual-phase xenon time project chamber operating in the Sanford Underground Research Facility in South Dakota, USA. We report on the results of a relativistic extension to the nonrelativistic effective field theory (NREFT) from a 5.5 t fiducial mass and 60 live days of exposure. We present constraints on couplings from covariant interactions arising from the coupling of vector, axial currents, and electric dipole moments of the nucleon to the magnetic and electric dipole moments of the weakly interacting massive particle which cannot be described by recasting previous results described by an NREFT. Using a profile-likelihood ratio analysis, in an energy region between 0  keV_{nr} to 270  keV_{nr}, we report 90% confidence level exclusion limits on the coupling strength of five interactions in both the isoscalar and isovector bases.
  • Journal article
    Scandale W, Cerutti F, Esposito LS, Garattini M, Gilardoni S, Losito R, Masi A, Mirarchi D, Redaelli S, Smirnov G, Bandiera L, Guidi V, Mazzolari A, Addesa FM, Iacoangeli F, Galluccio F, Afonin AG, Chesnokov YA, Durum AA, Maisheev VA, Sandomirskiy YE, Yanovich AA, Taratin AM, Gavrikov YA, Ivanova PY, Ivanov YM, Hall G, Pesaresi M, Rossi Ret al., 2024,

    Multiple scattering of positively charged particles moving near the (111) plane in a silicon single crystal

    , EUROPEAN PHYSICAL JOURNAL PLUS, Vol: 139, ISSN: 2190-5444
  • Journal article
    Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Bergauer T, Chatterjee S, Damanakis K, Dragicevic M, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Mikulec I, Schieck J, Schöfbeck R, Schwarz D, Sonawane M, Templ S, Waltenberger W, Wulz C-E, Darwish MR, Janssen T, Van Mechelen P, Breugelmans N, DHondt J, Dansana S, De Moor A, Delcourt M, Heyen F, Lowette S, Makarenko I, Müller D, Tavernier S, Tytgat M, Van Onsem GP, Van Putte S, Vannerom D, Clerbaux B, Das AK, De Lentdecker G, Evard H, Favart L, Gianneios P, Hohov D, Jaramillo J, Khalilzadeh A, Khan FA, Lee K, Mahdavikhorrami M, Malara A, Paredes S, Thomas L, Vanden Bemden M, Vander Velde C, Vanlaer P, De Coen M, Dobur D, Gokbulut G, Hong Y, Knolle J, Lambrecht L, Marckx D, Mestdach G, Mota Amarilo K, Rendón C, Samalan A, Skovpen K, Van Den Bossche N, van der Linden J, Wezenbeek L, Benecke A, Bethani A, Bruno G, Caputo C, De Favereau De Jeneret J, Delaere C, Donertas IS, Giammanco A, Guzel AO, Jain S, Lemaitre V, Lidrych J, Mastrapasqua P, Tran TT, Wertz S, Alves GA, Coelho E, Hensel C, Menezes De Oliveira T, Moraes A, Rebello Teles P, Soeiro M, Vilela Pereira A, Aldá Júnior WL, Alves Gallo Pereira M, Barroso Ferreira Filho M, Brandao Malbouisson H, Carvalho W, Chinellato J, Da Costa EM, Da Silveira GG, De Jesus Damiao D, Fonseca De Souza S, Gomes De Souza R, Macedo M, Martins J, Mora Herrera C, Mundim L, Nogima H, Pinheiro JP, Santoro A, Sznajder A, Thiel M, Bernardes CA, Calligaris L, Tomei TRFP, Gregores EM, Maietto Silverio I, Mercadante PG, Novaes SF, Orzari B, Padula SS, Aleksandrov A, Antchev G, Hadjiiska R, Iaydjiev P, Misheva M, Shopova M, Sultanov G, Dimitrov A, Litov L, Pavlov B, Petkov P, Petrov A, Shumka E, Keshri S, Thakur S, Cheng T, Javaid T, Yuan L, Hu Z, Liang Z, Liu J, Yi K, Chen GM, Chen HS, Chen M, Iemmi F, Jiang CH, Kapoor A, Liao H, Liu Z-A, Sharma R, Song JN, Tao J, Wang C, Wang J, Wang Z, Zhang H, Zhao J, Agapitos A, Ban Y, Deng S, Guo B, Levin A, Li C, Li Q, Mao Y, Qian S, Qian SJ, Sunet al., 2024,

    Searches for pair-produced multijet resonances using data scouting in proton-proton collisions at sqrt[s]=13  TeV

    , Physical Review Letters, Vol: 133, ISSN: 0031-9007

    Searches for pair-produced multijet signatures using data corresponding to an integrated luminosity of 128  fb−1 of proton-proton collisions at √𝑠=13  TeV are presented. A data scouting technique is employed to record events with low jet scalar transverse momentum sum values. The electroweak production of particles predicted in 𝑅-parity violating supersymmetric models is probed for the first time with fully hadronic final states. This is the first search for prompt hadronically decaying mass-degenerate higgsinos, and extends current exclusions on 𝑅-parity violating top squarks and gluinos.
  • Journal article
    Hayrapetyan A, Tumasyan A, Adam W, Andrejkovic JW, Bergauer T, Chatterjee S, Damanakis K, Dragicevic M, Hussain PS, Jeitler M, Krammer N, Li A, Liko D, Mikulec I, Schieck J, Schöfbeck R, Schwarz D, Sonawane M, Templ S, Waltenberger W, Wulz C-E, Darwish MR, Janssen T, Van Mechelen P, Breugelmans N, DHondt J, Dansana S, De Moor A, Delcourt M, Heyen F, Lowette S, Makarenko I, Müller D, Tavernier S, Tytgat M, Van Onsem GP, Van Putte S, Vannerom D, Clerbaux B, Das AK, De Lentdecker G, Evard H, Favart L, Gianneios P, Hohov D, Jaramillo J, Khalilzadeh A, Khan FA, Lee K, Mahdavikhorrami M, Malara A, Paredes S, Shahzad MA, Thomas L, Vanden Bemden M, Vander Velde C, Vanlaer P, De Coen M, Dobur D, Gokbulut G, Hong Y, Knolle J, Lambrecht L, Marckx D, Mestdach G, Mota Amarilo K, Samalan A, Skovpen K, Van Den Bossche N, van der Linden J, Wezenbeek L, Benecke A, Bethani A, Bruno G, Caputo C, De Favereau De Jeneret J, Delaere C, Donertas IS, Giammanco A, Guzel AO, Jain S, Lemaitre V, Lidrych J, Mastrapasqua P, Tran TT, Wertz S, Alves GA, Alves Gallo Pereira M, Coelho E, Correia Silva G, Hensel C, Menezes De Oliveira T, Moraes A, Rebello Teles P, Soeiro M, Vilela Pereira A, Aldá Júnior WL, Barroso Ferreira Filho M, Brandao Malbouisson H, Carvalho W, Chinellato J, Da Costa EM, Da Silveira GG, De Jesus Damiao D, Fonseca De Souza S, Gomes De Souza R, Macedo M, Martins J, Mora Herrera C, Mundim L, Nogima H, Pinheiro JP, Santoro A, Sznajder A, Thiel M, Bernardes CA, Calligaris L, Fernandez Perez Tomei TR, Gregores EM, Maietto Silverio I, Mercadante PG, Novaes SF, Orzari B, Padula SS, Aleksandrov A, Antchev G, Hadjiiska R, Iaydjiev P, Misheva M, Shopova M, Sultanov G, Dimitrov A, Litov L, Pavlov B, Petkov P, Petrov A, Shumka E, Keshri S, Thakur S, Cheng T, Javaid T, Yuan L, Hu Z, Liang Z, Liu J, Yi K, Chen GM, Chen HS, Chen M, Iemmi F, Jiang CH, Kapoor A, Liao H, Liu Z-A, Sharma R, Song JN, Tao J, Wang C, Wang J, Wang Z, Zhang H, Zhao J, Agapitos A, Ban Y, Deng S, Guo B, Jiang C, Levin Aet al., 2024,

    Search for soft unclustered energy patterns in proton-proton collisions at 13 TeV

    , Physical Review Letters, Vol: 133, ISSN: 0031-9007

    The first search for soft unclustered energy patterns (SUEPs) is performed using an integrated luminosity of 138  fb−1 of proton-proton collision data at √𝑠=13  TeV, collected in 2016–2018 by the CMS detector at the LHC. Such SUEPs are predicted by hidden valley models with a new, confining force with a large ’t Hooft coupling. In events with boosted topologies, selected by high-threshold hadronic triggers, the multiplicity and sphericity of clustered tracks are used to reject the background from standard model quantum chromodynamics. With no observed excess of events over the standard model expectation, limits are set on the cross section for production via gluon fusion of a scalar mediator with SUEP-like decays.
  • Journal article
    Abratenko P, Alterkait O, Andrade Aldana D, Arellano L, Asaadi J, Ashkenazi A, Balasubramanian S, Baller B, Barnard A, Barr G, Barrow D, Barrow J, Basque V, Bateman J, Benevides Rodrigues O, Berkman S, Bhanderi A, Bhat A, Bhattacharya M, Bishai M, Blake A, Bogart B, Bolton T, Book JY, Brunetti MB, Camilleri L, Cao Y, Caratelli D, Cavanna F, Cerati G, Chappell A, Chen Y, Conrad JM, Convery M, Cooper-Troendle L, Crespo-Anadón JI, Cross R, Del Tutto M, Dennis SR, Detje P, Diurba R, Djurcic Z, Dorrill R, Duffy K, Dytman S, Eberly B, Englezos P, Ereditato A, Evans JJ, Fine R, Foreman W, Fleming BT, Franco D, Furmanski AP, Gao F, Garcia-Gamez D, Gardiner S, Ge G, Gollapinni S, Gramellini E, Green P, Greenlee H, Gu L, Gu W, Guenette R, Guzowski P, Hagaman L, Hen O, Hilgenberg C, Horton-Smith GA, Imani Z, Irwin B, Ismail MS, James C, Ji X, Jo JH, Johnson RA, Jwa YJ, Kalra D, Kamp N, Karagiorgi G, Ketchum W, Kirby M, Kobilarcik T, Kreslo I, Lane N, Lepetic I, Li JY, Li Y, Lin K, Littlejohn BR, Liu H, Louis WC, Luo X, Mariani C, Marsden D, Marshall J, Martinez N, Martinez Caicedo DA, Martynenko Set al., 2024,

    Improving neutrino energy estimation of charged-current interaction events with recurrent neural networks in MicroBooNE

    , Physical Review D, Vol: 110, ISSN: 2470-0010

    We present a deep learning-based method for estimating the neutrino energy of charged-current neutrino-argon interactions. We employ a recurrent neural network (RNN) architecture for neutrino energy estimation in the MicroBooNE experiment, utilizing liquid argon time projection chamber (LArTPC) detector technology. Traditional energy estimation approaches in LArTPCs, which largely rely on reconstructing and summing visible energies, often experience sizable biases and resolution smearing because of the complex nature of neutrino interactions and the detector response. The estimation of neutrino energy can be improved after considering the kinematics information of reconstructed final-state particles. Utilizing kinematic information of reconstructed particles, the deep learning-based approach shows improved resolution and reduced bias for the muon neutrino Monte Carlo simulation sample compared to the traditional approach. In order to address the common concern about the effectiveness of this method on experimental data, the RNN-based energy estimator is further examined and validated with dedicated data-simulation consistency tests using MicroBooNE data. We also assess its potential impact on a neutrino oscillation study after accounting for all statistical and systematic uncertainties and show that it enhances physics sensitivity. This method has good potential to improve the performance of other physics analyses.
  • Journal article
    Aaij R, Abdelmotteleb ASW, Abellan Beteta C, Abudinén F, Ackernley T, Adefisoye AA, Adeva B, Adinolfi M, Adlarson P, Agapopoulou C, Aidala CA, Ajaltouni Z, Akar S, Akiba K, Albicocco P, Albrecht J, Alessio F, Alexander M, Aliouche Z, Alvarez Cartelle P, Amalric R, Amato S, Amey JL, Amhis Y, An L, Anderlini L, Andersson M, Andreianov A, Andreola P, Andreotti M, Andreou D, Anelli A, Ao D, Archilli F, Argenton M, Arguedas Cuendis S, Artamonov A, Artuso M, Aslanides E, Ataide Da Silva R, Atzeni M, Audurier B, Bacher D, Bachiller Perea I, Bachmann S, Bachmayer M, Back JJ, Baladron Rodriguez P, Balagura V, Baldini W, Balzani L, Bao H, Baptista de Souza Leite J, Barbero Pretel C, Barbetti M, Barbosa IR, Barlow RJ, Barnyakov M, Barsuk S, Barter W, Bartolini M, Bartz J, Basels JM, Bashir S, Bassi G, Batsukh B, Battista PB, Bay A, Beck A, Becker M, Bedeschi F, Bediaga IB, Behling NB, Belin S, Bellee V, Belous K, Belov I, Belyaev I, Benane G, Bencivenni G, Ben-Haim E, Berezhnoy A, Bernet R, Bernet Andres S, Bertolin A, Betancourt C, Betti F, Bex J, Bezshyiko I, Bhom J, Bieker MS, Biesuz NV, Billoir P, Biolchini A, Birch M, Bishop FCR, Bitadze A, Bizzeti A, Blake T, Blanc Fet al., 2024,

    Probing the nature of the χ<inf>c1</inf>(3872) state using radiative decays

    , Journal of High Energy Physics, Vol: 2024

    Abstract: The radiative decays χc1(3872) → ψ(2S) γ and χc1(3872) → J/ψγ are used to probe the nature of the χc1(3872) state using proton-proton collision data collected with the LHCb detector, corresponding to an integrated luminosity of 9 fb−1. Using the B+ → χc1(3872)K+ decay, the χc1(3872) → ψ(2S) γ process is observed for the first time and the ratio of its partial width to that of the χc1(3872) → J/ψγ decay is measured to be (Formula presented.) where the first uncertainty is statistical, the second systematic and the third is due to the uncertainties on the branching fractions of the ψ(2S) and J/ψ mesons. The measured ratio makes the interpretation of the χc1(3872) state as a pure D0D¯∗0 + D¯0 D*0 molecule questionable and strongly indicates a sizeable compact charmonium or tetraquark component within the χc1(3872) state.
  • Journal article
    Abud AA, Abi B, Acciarri R, Acero MA, Adames MR, Adamov G, Adamowski M, Adams D, Adinolfi M, Adriano C, Aduszkiewicz A, Aguilar J, Akbar F, Allison K, Monsalve SA, Alrashed M, Alton A, Alvarez R, Alves T, Amar H, Amedo P, Anderson J, Andreopoulos C, Andreotti M, Andrews MP, Andrianala F, Andringa S, Anfimov N, Ankowski A, Antic D, Antoniassi M, Antonova M, Antoshkin A, Aranda-Fernandez A, Arellano L, Diaz EA, Arroyave MA, Asaadi J, Ashkenazi A, Asner D, Asquith L, Atkin E, Auguste D, Aurisano A, Aushev V, Autiero D, Azam MB, Azfar F, Back A, Back H, Back JJ, Bagaturia I, Bagby L, Balashov N, Balasubramanian S, Baldi P, Baldini W, Baldonedo J, Baller B, Bambah B, Banerjee R, Barao F, Barbu D, Barenboim G, Alzás PB, Barker GJ, Barkhouse W, Barr G, Monarca JB, Barros A, Barros N, Barrow D, Barrow JL, Basharina-Freshville A, Bashyal A, Basque V, Batchelor C, Bathe-Peters L, Battat JBR, Battisti F, Bay F, Bazetto MCQ, Alba JLLB, Beacom JF, Bechetoille E, Behera B, Belchior E, Bell G, Bellantoni L, Bellettini G, Bellini V, Beltramello O, Benekos N, Montiel CB, Benjamin D, Neves FB, Berger J, Berkman S, Bernal J, Bernardini P, Bersani A, Bertolucci S, Betancourt M, Rodríguez AB, Bevan A, Bezawada Y, Bezerra AT, Bezerra TJ, Bhat A, Bhatnagar V, Bhatt J, Bhattacharjee M, Bhattacharya M, Bhuller S, Bhuyan B, Biagi S, Bian J, Biery K, Bilki B, Bishai M, Bitadze A, Blake A, Blaszczyk FD, Blazey GC, Blucher E, Bodek A, Bogenschuetz J, Boissevain J, Bolognesi S, Bolton T, Bomben L, Bonesini M, Bonilla-Diaz C, Bonini F, Booth A, Boran F, Bordoni S, Merlo RB, Borkum A, Bostan N, Bouet R, Boza J, Bracinik J, Brahma B, Brailsford D, Bramati F, Branca A, Brandt A, Bremer J, Brew C, Brice SJ, Brio V, Brizzolari C, Bromberg C, Brooke J, Bross A, Brunetti G, Brunetti M, Buchanan N, Budd H, Buergi J, Bundock A, Burgardt D, Butchart S, Caceres VG, Cagnoli I, Cai T, Calabrese R, Calabrese R, Calcutt J, Calivers L, Calvo E, Caminata A, Camino AF, Campanelli W, Campani A, Benitez AC, Canci Net al., 2024,

    First measurement of the total inelastic cross section of positively charged kaons on argon at energies between 5.0 and 7.5 GeV

    , Physical Review D: Particles, Fields, Gravitation and Cosmology, Vol: 110, ISSN: 1550-2368

    ProtoDUNE Single-Phase (ProtoDUNE-SP) is a 770-ton liquid argon time projection chamber that operated in a hadron test beam at the CERN Neutrino Platform in 2018. We present a measurement of the total inelastic cross section of charged kaons on argon as a function of kaon energy using 6 and 7  GeV/𝑐 beam momentum settings. The flux-weighted average of the extracted inelastic cross section at each beam momentum setting was measured to be 380±26  mbarns for the 6  GeV/𝑐 setting and 379±35  mbarns for the 7  GeV/𝑐 setting.

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