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Two-particle bose-einstein correlations and their Lévy parameters in PbPb collisions at sNN=5.02 TeV

Physical Review C 2024年第2期109卷 024914-024914页

作者： A. Tumasyan W. Adam J. W. Andrejkovic T. bergauer s. Chatterjee K. Damanakis M. Dragicevic A. escalante Del Valle P. s. Hussain M. Jeitler N. Krammer L. Lechner D. Liko I. Mikulec P. Paulitsch J. schieck R. schöfbeck D. schwarz M. sonawane s. Templ W. Waltenberger C.-e. Wulz M. R. Darwish T. Janssen T. Kello H. Rejeb sfar P. Van Mechelen e. s. bols J. D'Hondt A. De Moor M. Delcourt H. el Faham s. Lowette A. Morton D. Müller A. R. sahasransu s. Tavernier W. Van Doninck s. Van Putte D. Vannerom b. Clerbaux s. Dansana G. De Lentdecker L. Favart D. Hohov J. Jaramillo K. Lee M. Mahdavikhorrami I. Makarenko A. Malara s. Paredes L. Pétré N. Postiau L. Thomas M. Vanden bemden C. Vander Velde P. Vanlaer D. Dobur J. Knolle L. Lamb.e.ht G. Mestdach C. Rendón A. samalan K. skovpen M. Tytgat N. Van Den bossche b. Vermassen L. Wezenb.e. A. benecke G. bruno F. bury C. Caputo P. David C. Delaere I. s. Donertas A. Giammanco K. Jaffel sa. Jain V. Lemaitre K. Mondal A. Taliercio T. T. Tran P. Vischia s. Wertz G. A. Alves e. Coelho C. Hensel A. Moraes P. Rebello Teles W. L. Aldá Júnior M. Alves Gallo Pereira M. barroso Ferreira Filho H. brandao Malbouisson W. Carvalho J. Chinellato e. M. Da Costa G. G. Da silveira D. De Jesus Damiao V. Dos santos sousa s. Fonseca De souza J. Martins C. Mora Herrera K. Mota Amarilo L. Mundim H. Nogima A. santoro s. M. silva Do Amaral A. sznajder M. Thiel A. Vilela Pereira C. A. bernardes L. Calligaris T. R. Fernandez Perez Tomei e. M. Gregores P. G. Mercadante s. F. Novaes sandra s. Padula A. Aleksandrov G. Antchev R. Hadjiiska P. Iaydjiev M. Misheva M. Rodozov M. shopova G. sultanov A. Dimitrov T. Ivanov L. Litov b. Pavlov P. Petkov A. Petrov e. shumka s. Thakur T. Cheng T. Javaid M. Mittal L. Yuan M. Ahmad G. bauer Z. Hu s. Lezki K. Yi G. M. Chen H. s. Chen M. Chen F. Iemmi C. H. Jiang A. Kapoor H. Liao Z.-A. Liu V. Milosevic F. Monti R. sharma J. Tao J. Thomas-Wilsker J. Wang H. Zhang J. Zhao A. Agapitos Y. An Y. ban A. Levin C. Li Q. Li X. Lyu Y. Mao s. J. Qian X. sun D. Wang J. Xiao H. Yang M. L Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Vienna Austria Indian Institute of Technology Madras Madras India Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Korea University Seoul Korea Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Estadual Paulista Universidade Federal do ABC São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences Sofia Bulgaria University of Sofia Sofia Bulgaria Instituto De Alta Investigación Universidad de Tarapacá Casilla 7 D Arica Chile Beihang University Beijing China Department of Physics Tsinghua University Beijing China Institute of High Energy Physics Beijing China Massachusetts Institute of Technology Cambridge Massachusetts USA State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Sun Yat-Sen University Guangzhou China University of Science and Technology of China Hefei China Institute of Modern Physics and Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) - Fudan University Shanghai China Rice University Houston Texas USA Zhejiang University Hangzhou Zhejiang China Universidad de Los Andes Bogota Colombia Universidad de Antioquia Medellin Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Escuela Politecnica Nacional Quito Ecuador Universidad San Francisco de Quito Quito Ecuador Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Phys

Two-particle bose–einstein momentum correlation functions are studied for charged-hadron pairs in lead-lead collisions at a center-of-mass energy per nucleon pair of sNN=5.02TeV. The data sample, containing 4.27×109 minimum bias events corresponding to an integrated luminosity of 0.607 nb−1, was collected by the CMs experiment in 2018. The experimental results are discussed in terms of a Lévy-type source distribution. The parameters of this distribution are extracted as functions of particle pair average transverse mass and collision centrality. These parameters include the Lévy index or shape parameter α, the Lévy scale parameter R, and the correlation strength parameter λ. The source shape, characterized by α, is found to be neither Cauchy nor Gaussian, implying the need for a full Lévy analysis. similarly to what was previously found for systems characterized by Gaussian source radii, a hydrodynamical scaling is ob.e.ved for the Lévy R parameter. The λ parameter is studied in terms of the core-halo model.

关键词： Particle correlations & fluctuations Relativistic heavy-ion collisions

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search for pair production of scalar and vector leptoquarks decaying to muons and bottom quarks in proton-proton collisions at s=13 TeV

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Physical Review D 2024年第11期109卷 112003-112003页

作者： A. Hayrapetyan A. Tumasyan W. Adam J. W. Andrejkovic T. bergauer s. Chatterjee K. Damanakis M. Dragicevic P. s. Hussain M. Jeitler N. Krammer A. Li D. Liko I. Mikulec J. schieck R. schöfbeck D. schwarz M. sonawane s. Templ W. Waltenberger C.-e. Wulz M. R. Darwish T. Janssen P. Van Mechelen e. s. bols J. D’Hondt s. Dansana A. De Moor M. Delcourt H. el Faham s. Lowette I. Makarenko D. Müller A. R. sahasransu s. Tavernier M. Tytgat s. Van Putte D. Vannerom b. Clerbaux G. De Lentdecker L. Favart D. Hohov J. Jaramillo A. Khalilzadeh K. Lee M. Mahdavikhorrami A. Malara s. Paredes L. Pétré N. Postiau L. Thomas M. Vanden bemden C. Vander Velde P. Vanlaer M. De Coen D. Dobur Y. Hong J. Knolle L. Lamb.e.ht G. Mestdach C. Rendón A. samalan K. skovpen N. Van Den bossche J. van der Linden L. Wezenb.e. A. benecke A. bethani G. bruno C. Caputo C. Delaere I. s. Donertas A. Giammanco K. Jaffel sa. Jain V. Lemaitre J. Lidrych P. Mastrapasqua K. Mondal T. T. Tran s. Wertz G. A. Alves e. Coelho C. Hensel T. Menezes De Oliveira A. Moraes P. Rebello Teles M. soeiro W. L. Aldá Júnior M. Alves Gallo Pereira M. barroso Ferreira Filho H. brandao Malbouisson W. Carvalho J. Chinellato e. M. Da Costa G. G. Da silveira D. De Jesus Damiao s. Fonseca De souza R. Gomes De souza J. Martins C. Mora Herrera K. Mota Amarilo L. Mundim H. Nogima A. santoro A. sznajder M. Thiel A. Vilela Pereira C. A. bernardes L. Calligaris T. R. Fernandez Perez Tomei e. M. Gregores P. G. Mercadante s. F. Novaes b. Orzari sandra s. Padula A. Aleksandrov G. Antchev R. Hadjiiska P. Iaydjiev M. Misheva M. shopova G. sultanov A. Dimitrov L. Litov b. Pavlov P. Petkov A. Petrov e. shumka s. Keshri s. Thakur T. Cheng Q. Guo T. Javaid L. Yuan Z. Hu J. Liu K. Yi G. M. Chen H. s. Chen M. Chen F. Iemmi C. H. Jiang A. Kapoor H. Liao Z.-A. Liu R. sharma J. N. song J. Tao C. Wang J. Wang Z. Wang H. Zhang A. Agapitos Y. ban A. Levin C. Li Q. Li Y. Mao s. J. Qian X. sun D. Wang H. Yang L. Zhang C. Zhou Z. You N. Lu G. bauer X. Gao D. Leggat H. Okawa Z. Lin C. Lu M. Xiao C. Avila D. A Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Vienna Austria Indian Institute of Technology Madras Madras India Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Korea University Seoul Korea Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Estadual Paulista Universidade Federal do ABC São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences Sofia Bulgaria University of Sofia Sofia Bulgaria Instituto De Alta Investigación Universidad de Tarapacá Casilla 7 D Arica Chile Beihang University Beijing China Department of Physics Tsinghua University Beijing China Institute of High Energy Physics Beijing China California Institute of Technology Pasadena California USA University of Florida Gainesville Florida USA Massachusetts Institute of Technology Cambridge Massachusetts USA State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Sun Yat-Sen University Guangzhou China University of Science and Technology of China Hefei China Nanjing Normal University Nanjing China Institute of Modern Physics and Key Laboratory of Nuclear Physics and Ion-beam Application (MOE)-Fudan University Shanghai China Zhejiang University Hangzhou Zhejiang China Universidad de Los Andes Bogota Colombia Universidad de Antioquia Medellin Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Escuela Politecnica Nacional Quito Ecuador Universidad San Francisco de Quito Quito Ecuador

A search for pair production of scalar and vector leptoquarks (LQs) each decaying to a muon and a bottom quark is performed using proton-proton collision data collected at s=13 TeV with the CMs detector at the CeRN LHC, corresponding to an integrated luminosity of 138 fb−1. No excess above standard model expectation is ob.e.ved. scalar (vector) LQs with masses less than 1810 (2120) GeV are excluded at 95% confidence level, assuming a 100% branching fraction of the LQ decaying to a muon and a bottom quark. These limits represent the most stringent to date.

关键词： Leptoquarks Hadron colliders

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search for heavy resonances decaying to WW, WZ, or WH boson pairs in a final state consisting of a lepton and a large-radius jet in proton-proton collisions at s=13 TeV

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Physical Review D 2022年第3期105卷 032008-032008页

作者： A. Tumasyan W. Adam J. W. Andrejkovic T. bergauer s. Chatterjee M. Dragicevic A. escalante Del Valle R. Frühwirth M. Jeitler N. Krammer L. Lechner D. Liko I. Mikulec P. Paulitsch F. M. Pitters J. schieck R. schöfbeck M. spanring s. Templ W. Waltenberger C.-e. Wulz V. Chekhovsky A. Litomin V. Makarenko M. R. Darwish e. A. De Wolf X. Janssen T. Kello A. Lelek H. Rejeb sfar P. Van Mechelen s. Van Putte N. Van Remortel F. b.e.man e. s. bols J. D’Hondt J. De Clercq M. Delcourt H. el Faham s. Lowette s. Moortgat A. Morton D. Müller A. R. sahasransu s. Tavernier W. Van Doninck P. Van Mulders D. beghin b. bilin b. Clerbaux G. De Lentdecker L. Favart A. Grebenyuk A. K. Kalsi K. Lee M. Mahdavikhorrami I. Makarenko L. Moureaux L. Pétré A. Popov N. Postiau e. starling L. Thomas M. Vanden bemden C. Vander Velde P. Vanlaer D. Vannerom L. Wezenb.e. T. Cornelis D. Dobur J. Knolle L. Lamb.e.ht G. Mestdach M. Niedziela C. Roskas A. samalan K. skovpen M. Tytgat W. Verbeke b. Vermassen M. Vit A. bethani G. bruno F. bury C. Caputo P. David C. Delaere I. s. Donertas A. Giammanco K. Jaffel sa. Jain V. Lemaitre K. Mondal J. Prisciandaro A. Taliercio M. Teklishyn T. T. Tran P. Vischia s. Wertz G. A. Alves C. Hensel A. Moraes W. L. Aldá Júnior M. Alves Gallo Pereira M. barroso Ferreira Filho H. brandao Malbouisson W. Carvalho J. Chinellato e. M. Da Costa G. G. Da silveira D. De Jesus Damiao s. Fonseca De souza D. Matos Figueiredo C. Mora Herrera K. Mota Amarilo L. Mundim H. Nogima P. Rebello Teles A. santoro s. M. silva Do Amaral A. sznajder M. Thiel F. Torres Da silva De Araujo A. Vilela Pereira C. A. bernardes L. Calligaris T. R. Fernandez Perez Tomei e. M. Gregores D. s. Lemos P. G. Mercadante s. F. Novaes sandra s. Padula A. Aleksandrov G. Antchev R. Hadjiiska P. Iaydjiev M. Misheva M. Rodozov M. shopova G. sultanov A. Dimitrov T. Ivanov L. Litov b. Pavlov P. Petkov A. Petrov T. Cheng Q. Guo T. Javaid M. Mittal H. Wang L. Yuan M. Ahmad G. bauer C. Dozen Z. Hu J. Martins Y. Wang K. Yi e. Chapon G. M. Chen H. s. Chen M. Chen F. Iemmi A. Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Vienna Austria Institute for Nuclear Problems Minsk Belarus Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Korea University Seoul Korea Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Estadual Paulista São Paulo Brazil Universidade Federal do ABC São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences Sofia Bulgaria University of Sofia Sofia Bulgaria Beihang University Beijing China Rutgers The State University of New Jersey Piscataway New Jersey USA Department of Physics Tsinghua University Beijing China Institute of High Energy Physics Beijing China Massachusetts Institute of Technology Cambridge Massachusetts USA State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China The University of Kansas Lawrence Kansas USA Sun Yat-Sen University Guangzhou China Institute of Modern Physics and Key Laboratory of Nuclear Physics and Ion-beam Application (MOE)—Fudan University Shanghai China Zhejiang University Hangzhou China Universidad de Los Andes Bogota Colombia Universidad de Antioquia Medellin Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Escuela Politecnica Nacional Quito Ecuador Universidad San Francisco de Quito Quito Ecuador Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Physics Cairo Egypt Center for High Energy Physics (CHEP-FU)

A search for new heavy resonances decaying to pairs of bosons (WW, WZ, or WH) is presented. The analysis uses data from proton-proton collisions collected with the CMs detector at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 137 fb−1. One of the bosons is required to be a W boson decaying to an electron or muon and a neutrino, while the other boson is required to be reconstructed as a single jet with mass and substructure compatib.e.with a quark pair from a W, Z, or Higgs boson decay. The search is performed in the resonance mass range between 1.0 and 4.5 TeV and includes a specific search for resonances produced via vector boson fusion. The signal is extracted using a two-dimensional maximum likelihood fit to the jet mass and the diboson invariant mass distributions. No significant excess is ob.e.ved above the estimated background. Model-independent upper limits on the production cross sections of spin-0, spin-1, and spin-2 heavy resonances are derived as functions of the resonance mass and are interpreted in the context of bulk radion, heavy vector triplet, and bulk graviton models. The reported bounds are the most stringent to date.

关键词： Higgs bosons Hypothetical particles W & Z bosons Hadron colliders

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Ob.e.vation of high-energy neutrinos from the Galactic plane

arXiv

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arXiv 2023年

作者： Abbasi, R. Ackermann, M. Adams, J. Aguilar, J.A. Ahlers, M. Ahrens, M. Alameddine, J.M. Alves, A.A. Amin, N.M. Andeen, K. Anderson, T. Anton, G. Argüelles, C. Ashida, Y. Athanasiadou, s. Axani, s. bai, X. balagopal, A. barwick, s.W. basu, V. baur, s. bay, R. beatty, J.J. becker, K.-H. Tjus, J. becker beise, J. bellenghi, C. benda, s. benZvi, s. berley, D. bernardini, e. besson, D.Z. binder, G. bindig, D. blaufuss, e. blot, s. boddenberg, M. bontempo, F. book, J.Y. borowka, J. böser, s. botner, O. böttcher, J. bourbeau, e. bradascio, F. braun, J. brinson, b. bron, s. brostean-Kaiser, J. burley, R.T. busse, R.s. Campana, M.A. Carnie-bronca, e.G. Chen, C. Chen, Z. Chirkin, D. Choi, K. Clark, b.A. Clark, K. Classen, L. Coleman, A. Collin, G.H. Connolly, A. Conrad, J.M. Coppin, P. Correa, P. Cowen, D.F. Cross, R. Dappen, C. Dave, P. De Clercq, C. DeLaunay, J.J. López, D. Delgado Dembinski, H. Deoskar, K. Desai, A. Desiati, P. de Vries, K.D. de Wasseige, G. DeYoung, T. Diaz, A. Díaz-Vélez, J.C. Dittmer, M. Dujmovic, H. Dunkman, M. DuVernois, M.A. ehrhardt, T. eller, P. engel, R. erpenbeck, H. evans, J. evenson, P.A. Fan, K.L. Fazely, A.R. Fedynitch, A. Feigl, N. Fiedlschuster, s. Fienberg, A.T. Finley, C. Fischer, L. Fox, D. Franckowiak, A. Friedman, e. Fritz, A. Fürst, P. Gaisser, T.K. Gallagher, J. Ganster, e. Garcia, A. Garrappa, s. Gerhardt, L. Ghadimi, A. Glaser, C. Glauch, T. Glüsenkamp, T. Goehlke, N. Goldschmidt, A. Gonzalez, J.G. Goswami, s. Grant, D. Grégoire, T. Griswold, s. Günther, C. Gutjahr, P. Haack, C. Hallgren, A. Halliday, R. Halve, L. Halzen, F. Minh, M. Ha Hanson, K. Hardin, J. Harnisch, A.A. Haungs, A. Helbing, K. Henningsen, F. Hettinger, e.C. Hickford, s. Hignight, J. Hill, C. Hill, G.C. Hoffman, K.D. Hoshina, K. Hou, W. Huang, F. Huber, M. Huber, T. Hultqvist, K. Hünnefeld, M. Hussain, R. Hymon, K. In, s. Iovine, N. Ishihara, A. Jansson, M. Japaridze, G.s. Jeong, M. Jin, M. III. Physikalisches Institut RWTH Aachen University AachenD-52056 Germany Department of Physics University of Adelaide Adelaide5005 Australia Department of Physics and Astronomy University of Alaska Anchorage AnchorageAK99508 United States Department of Physics University of Texas at Arlington ArlingtonTX76019 United States The Center for Theoretical Studies of Physical Systems Clark-Atlanta University AtlantaGA30314 United States School of Physics Center for Relativistic Astrophysics Georgia Institute of Technology AtlantaGA30332 United States Department of Physics Southern University Baton RougeLA70813 United States Department of Physics University of California BerkeleyCA94720 United States Lawrence Berkeley National Laboratory BerkeleyCA94720 United States Institut für Physik Humboldt-Universität zu Berlin BerlinD-12489 Germany Fakultät für Physik & Astronomie Ruhr-Universität Bochum BochumD-44780 Germany Université Libre de Bruxelles Science Faculty CP230 BrusselsB-1050 Belgium Vrije Universiteit Brussel Dienst Elementary Particles BrusselsB-1050 Belgium Department of Physics Laboratory for Particle Physics and Cosmology Harvard University CambridgeMA02138 United States Department of Physics Massachusetts Institute of Technology CambridgeMA02139 United States Department of Physics The International Center for Hadron Astrophysics Chiba University Chiba263-8522 Japan Department of Physics Loyola University Chicago ChicagoIL60660 United States Department of Physics and Astronomy University of Canterbury Private Bag 4800 Christchurch New Zealand Department of Physics University of Maryland College ParkMD20742 United States Department of Astronomy Ohio State University ColumbusOH43210 United States Department of Physics Center for Cosmology and Astro-Particle Physics Ohio State University ColumbusOH43210 United States Niels Bohr Institute University of Copenhagen CopenhagenDK-2100 Denmark Department of Physics

The origin of high-energy cosmic rays, atomic nuclei that continuously impact earth’s atmosphere, has b.e. a mystery for over a century. Due to deflection in interstellar magnetic fields, cosmic rays from the Milky Way arrive at earth from random directions. However, near their sources and during propagation, cosmic rays interact with matter and produce high-energy neutrinos. We search for neutrino emission using machine learning techniques applied to ten years of data from the IceCube Neutrino Ob.e.vatory. We identify neutrino emission from the Galactic plane at the 4.5σ level of significance, by comparing diffuse emission models to a background-only hypothesis. The signal is consistent with modeled diffuse emission from the Galactic plane, but could also arise from a population of unresolved point sources. Copyright © 2023, The Authors. All rights reserved.

关键词： Cosmic rays

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search for rare decays of the Z and Higgs bosons to a J/ψ or ψ(2s) meson and a photon in proton-proton collisions at s=13TeV

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Physics Letters, section b: Nuclear, elementary Particle and High-energy Physics 2025年 865卷

作者： Hayrapetyan, A. Tumasyan, A. Adam, W. Andrejkovic, J.W. bergauer, T. Chatterjee, s. Damanakis, K. Dragicevic, M. Hussain, P.s. 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, M.R. Janssen, T. Van Mechelen, P. b.e.gelmans, N. Dansana, s. De Moor, A. Delcourt, M. Heyen, F. Lowette, s. Makarenko, I. Müller, D. Tavernier, s. Tytgat, M. Van Onsem, G.P. Van Putte, s. Vannerom, D. bilin, b. Clerbaux, b. Das, A.K. De Lentdecker, G. evard, H. Favart, L. Gianneios, P. Jaramillo, J. Khalilzadeh, A. Khan, F.A. Lee, K. Mahdavikhorrami, M. Malara, A. Paredes, s. shahzad, M.A. Thomas, L. Vanden bemden, M. Vander Velde, C. Vanlaer, P. De Coen, M. Dobur, D. Gokbulut, G. Hong, Y. Knolle, J. Lamb.e.ht, L. Marckx, D. Mota Amarilo, K. samalan, A. skovpen, K. Van Den bossche, N. van der Linden, J. Wezenb.e., L. benecke, A. bethani, A. bruno, G. Caputo, C. De Favereau De Jeneret, J. Delaere, C. Donertas, I.s. Giammanco, A. Guzel, A.O. Jain, sh. Lemaitre, V. Lidrych, J. Mastrapasqua, P. Tran, T.T. Wertz, s. Alves, G.A. 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, W.L. barroso Ferreira Filho, M. brandao Malbouisson, H. Carvalho, W. Chinellato, J. Da Costa, e.M. Da silveira, G.G. De Jesus Damiao, D. Fonseca De souza, s. Gomes De souza, R. Macedo, M. Martins, J. Mora Herrera, C. Mundim, L. Nogima, H. Pinheiro, J.P. santoro, A. sznajder, A. Thiel, M. bernardes, C.A. Calligaris, L. Fernandez Perez Tomei, T.R. Gregores, e.M. Maietto silverio, I. Mercadante, P.G. Novaes, s.F. Orzari, b. Padula, sandra s. 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, G.M. Chen, H.s. Chen, M. Iemmi, F. Jiang, C.H. Kapoor, A. Liao, H. Liu, Z.-A. shar Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Vienna Austria Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Estadual Paulista Universidade Federal do ABC São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences Sofia Bulgaria University of Sofia Sofia Bulgaria Instituto De Alta Investigación Universidad de Tarapacá Casilla 7 D Arica Chile Beihang University Beijing China Department of Physics Tsinghua University Beijing China Institute of High Energy Physics Beijing China State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Guangdong Provincial Key Laboratory of Nuclear Science and Guangdong-Hong Kong Joint Laboratory of Quantum Matter South China Normal University Guangzhou China Sun Yat-Sen University Guangzhou China University of Science and Technology of China Hefei China Nanjing Normal University Nanjing China Institute of Modern Physics Key Laboratory of Nuclear Physics Ion-beam Application (MOE) Fudan University Shanghai China Zhejiang University Zhejiang Hangzhou China Universidad de Los Andes Bogota Colombia Universidad de Antioquia Medellin Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Escuela Politecnica Nacional Quito Ecuador Universidad San Francisco de Quito Quito Ecuador Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Ene

A search is presented for rare decays of the [Figure presented] and Higgs bosons to a photon and a [Figure presented] or a [Figure presented] meson, with the charmonium state sub.e.uentially decaying to a pair of muons. The data set corresponds to an integrated luminosity of 123fb−1sup> of proton-proton collisions at a center-of-mass energy of 13 TeV collected with the CMs detector at the LHC. No evidence for branching fractions of these rare decay channels larger than predicted in the standard model is ob.e.ved. Upper limits at 95% confidence level are set: [Figure presented], [Figure presented], [Figure presented], and [Figure presented]. The ratio of the Higgs boson coupling modifiers [Figure presented] is constrained to be in the interval (−157,+199) at 95% confidence level. Assuming [Figure presented], this interval becomes (−166,+208). © 2025 CeRN for the benefit of the CMs Collaboration

关键词： CMs Higgs J/psi Photon Rare decays sMP

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study of azimuthal anisotropy of ϒ(1s) mesons in pPb collisions at sNNsub> = 8.16 TeV

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Physics Letters, section b: Nuclear, elementary Particle and High-energy Physics 2024年 850卷

作者： Tumasyan, A. Adam, W. Andrejkovic, J.W. bergauer, T. Chatterjee, s. Damanakis, K. Dragicevic, M. escalante Del Valle, A. Hussain, P.s. Jeitler, M. Krammer, N. Lechner, L. Liko, D. Mikulec, I. Paulitsch, P. Pitters, F.M. schieck, J. schöfbeck, R. schwarz, D. sonawane, M. Templ, s. Waltenberger, W. Wulz, C.-e. Darwish, M.R. Janssen, T. Kello, T. Rejeb sfar, H. Van Mechelen, P. bols, e.s. De Moor, A. Delcourt, M. el Faham, H. Lowette, s. Moortgat, s. Morton, A. Müller, D. sahasransu, A.R. Tavernier, s. Van Doninck, W. Vannerom, D. Clerbaux, b. De Lentdecker, G. Favart, L. Hohov, D. Jaramillo, J. Lee, K. Mahdavikhorrami, M. Makarenko, I. Malara, A. Paredes, s. Pétré, L. Postiau, N. Thomas, L. Vanden bemden, M. Vander Velde, C. Vanlaer, P. Dobur, D. Knolle, J. Lamb.e.ht, L. Mestdach, G. Niedziela, M. Rendón, C. Roskas, C. samalan, A. skovpen, K. Tytgat, M. Van Den bossche, N. Vermassen, b. Wezenb.e., L. benecke, A. bruno, G. bury, F. Caputo, C. David, P. Delaere, C. Donertas, I.s. Giammanco, A. Jaffel, K. Jain, sa. Lemaitre, V. Mondal, K. Taliercio, A. Tran, T.T. Vischia, P. Wertz, s. Alves, G.A. Coelho, e. Hensel, C. Moraes, A. Rebello Teles, P. Aldá Júnior, W.L. Alves Gallo Pereira, M. barroso Ferreira Filho, M. brandao Malbouisson, H. Carvalho, W. Chinellato, J. Da Costa, e.M. Da silveira, G.G. De Jesus Damiao, D. Dos santos sousa, V. Fonseca De souza, s. Martins, J. Mora Herrera, C. Mota Amarilo, K. Mundim, L. Nogima, H. santoro, A. silva Do Amaral, s.M. sznajder, A. Thiel, M. Torres Da silva De Araujo, F. Vilela Pereira, A. bernardes, C.A. Calligaris, L. Fernandez Perez Tomei, T.R. Gregores, e.M. Mercadante, P.G. Novaes, s.F. Padula, sandra s. Aleksandrov, A. Antchev, G. Hadjiiska, R. Iaydjiev, P. Misheva, M. Rodozov, M. shopova, M. sultanov, G. Dimitrov, A. Ivanov, T. Litov, L. Pavlov, b. Petkov, P. Petrov, A. shumka, e. Thakur, s. Cheng, T. Javaid, T. Mittal, M. Yuan, L. Ahmad, M. bauer, G. Hu, Z. Lezki, s. Yi, K. Chen, G.M. Chen, H.s. Chen, M. Iemmi, F. Jiang, C.H. Kapoor, A. Liao, H. Liu, Z.-A. Milosevic, V. Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Vienna Austria Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Estadual Paulista Universidade Federal do ABC São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences Sofia Bulgaria University of Sofia Sofia Bulgaria Instituto De Alta Investigación Universidad de Tarapacá Casilla 7 D Arica Chile Beihang University Beijing China Department of Physics Tsinghua University Beijing China Institute of High Energy Physics Beijing China State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Sun Yat-Sen University Guangzhou China University of Science and Technology of China Hefei China Institute of Modern Physics Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) Fudan University Shanghai China Zhejiang University Zhejiang Hangzhou China Universidad de Los Andes Bogota Colombia Universidad de Antioquia Medellin Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Escuela Politecnica Nacional Quito Ecuador Universidad San Francisco de Quito Quito Ecuador Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Physics Cairo Egypt Center for High Energy Physics (CHEP-FU) Fayoum University El-Fayoum Egypt National Institute of Chemical Physics and Biophysics Tallinn Estonia Department of Physics Uni

The azimuthal anisotropy of [Formula presented] mesons in high-multiplicity proton-lead collisions is studied using data collected by the CMs experiment at a nucleon-nucleon center-of-mass energy of 8.16TeV. The [Formula presented] mesons are reconstructed using their dimuon decay channel. The anisotropy is characterized by the second Fourier harmonic coefficients, found using a two-particle correlation technique, in which the [Formula presented] mesons are correlated with charged hadrons. A large pseudorapidity gap is used to suppress short-range correlations. Nonflow contamination from the dijet background is removed using a low-multiplicity subtraction method, and the results are presented as a function of [Formula presented] transverse momentum. The azimuthal anisotropies are smaller than those found for charmonia in proton-lead collisions at the same collision energy, but are consistent with values found for [Formula presented] mesons in lead-lead interactions at a nucleon-nucleon center-of-mass energy of 5.02 TeV. © 2024 The Author(s)

关键词： CMs Flow Heavy ion pPb Upsilon v2

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Using Z boson events to study Parton-Medium Interactions in Pb-Pb Collisions

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Physical Review Letters 2022年第12期128卷 122301-122301页

作者： A. M. sirunyan A. Tumasyan W. Adam F. Ambrogi T. bergauer M. Dragicevic J. erö A. escalante Del Valle R. Frühwirth M. Jeitler N. Krammer L. Lechner D. Liko T. Madlener I. Mikulec F. M. Pitters N. Rad J. schieck R. schöfbeck M. spanring s. Templ W. Waltenberger C.-e. Wulz M. Zarucki V. Chekhovsky A. Litomin V. Makarenko J. suarez Gonzalez M. R. Darwish e. A. De Wolf D. Di Croce X. Janssen T. Kello A. Lelek M. Pieters H. Rejeb sfar H. Van Haevermaet P. Van Mechelen s. Van Putte N. Van Remortel F. b.e.man e. s. bols s. s. Chhibra J. D’Hondt J. De Clercq D. Lontkovskyi s. Lowette I. Marchesini s. Moortgat A. Morton Q. Python s. Tavernier W. Van Doninck P. Van Mulders D. beghin b. bilin b. Clerbaux G. De Lentdecker b. Dorney L. Favart A. Grebenyuk A. K. Kalsi I. Makarenko L. Moureaux L. Pétré A. Popov N. Postiau e. starling L. Thomas C. Vander Velde P. Vanlaer D. Vannerom L. Wezenb.e. T. Cornelis D. Dobur M. Gruchala I. Khvastunov M. Niedziela C. Roskas K. skovpen M. Tytgat W. Verbeke b. Vermassen M. Vit G. bruno F. bury C. Caputo P. David C. Delaere M. Delcourt I. s. Donertas A. Giammanco V. Lemaitre K. Mondal J. Prisciandaro A. Taliercio M. Teklishyn P. Vischia s. Wuyckens J. Zobec G. A. Alves G. Correia silva C. Hensel A. Moraes W. L. Aldá Júnior e. belchior batista Das Chagas H. bRANDAO MALbOUIssON W. Carvalho J. Chinellato e. Coelho e. M. Da Costa G. G. Da silveira D. De Jesus Damiao s. Fonseca De souza J. Martins D. Matos Figueiredo M. Medina Jaime M. Melo De Almeida C. Mora Herrera L. Mundim H. Nogima P. Rebello Teles L. J. sanchez Rosas A. santoro s. M. silva Do Amaral A. sznajder M. Thiel e. J. Tonelli Manganote F. Torres Da silva De Araujo A. Vilela Pereira C. A. bernardes L. Calligaris T. R. Fernandez Perez Tomei e. M. Gregores D. s. Lemos P. G. Mercadante s. F. Novaes sandra s. Padula A. Aleksandrov G. Antchev I. Atanasov R. Hadjiiska P. Iaydjiev M. Misheva M. Rodozov M. shopova G. sultanov M. bonchev A. Dimitrov T. Ivanov L. Litov b. Pavlov P. Petkov A. Petrov W. Fang Q. Guo H. Wang L. Yuan M. Ahmad Z. Hu Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Wien Austria Institute for Nuclear Problems Minsk Belarus Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Estadual Paulista São Paulo Brazil Universidade Federal do ABC São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences Sofia Bulgaria University of Sofia Sofia Bulgaria Beihang University Beijing China Rutgers The State University of New Jersey Piscataway New Jersey USA Department of Physics Tsinghua University Beijing China University of Virginia Charlottesville Virginia USA Institute of High Energy Physics Beijing China Massachusetts Institute of Technology Cambridge Massachusetts USA State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China The University of Kansas Lawrence Kansas USA Sun Yat-Sen University Guangzhou China Institute of Modern Physics and Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) - Fudan University Shanghai China Zhejiang University Hangzhou China Universidad de Los Andes Bogota Colombia Universidad de Antioquia Medellin Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Escuela Politecnica Nacional Quito Ecuador Universidad San Francisco de Quito Quito Ecuador Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Physics Cairo Egypt Center for High En

The spectra measurements of charged hadrons produced in the shower of a parton originating in the same hard scattering with a leptonically decaying Z boson are reported in lead-lead nuclei (Pb-Pb) and proton-proton (pp) collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV. both Pb-Pb and pp data sets are recorded by the CMs experiment at the LHC and correspond to an integrated luminosity of 1.7 nb−1 and 320 pb−1, respectively. Hadronic collision data with one reconstructed Z boson candidate with the transverse momentum pT>30 GeV/c are analyzed. The Z boson constrains the initial energy and direction of the associated parton. In heavy ion events, azimuthal angular distributions of charged hadrons with respect to the direction of a Z boson are sensitive to modifications of the in-medium parton shower and medium response. compared to reference data from pp interactions, the results for central Pb-Pb collisions indicate a modification of the angular correlations. The measurements of the fragmentation functions and pT spectra of charged particles in Z boson events, which are sensitive to medium modifications of the parton shower longitudinal structure, are also reported. significant modifications in central Pb-Pb.e.ents compared to the pp reference data are also found for these ob.e.vab.e..

关键词： Quark-gluon plasma Relativistic heavy-ion collisions W & Z bosons Hadron colliders

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Kssub>0sup> and Λ(Λ‾) two-particle femtoscopic correlations in PbPb collisions at sNNsub>=5.02TeV

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Physics Letters, section b: Nuclear, elementary Particle and High-energy Physics 2024年 857卷

作者： Tumasyan, A. Adam, W. Andrejkovic, J.W. bergauer, T. Chatterjee, s. Damanakis, K. Dragicevic, M. escalante Del Valle, A. Hussain, P.s. Jeitler, M. Krammer, N. Lechner, L. Liko, D. Mikulec, I. Paulitsch, P. schieck, J. schöfbeck, R. schwarz, D. sonawane, M. Templ, s. Waltenberger, W. Wulz, C.-e. Darwish, M.R. Janssen, T. Kello, T. Rejeb sfar, H. Van Mechelen, P. bols, e.s. De Moor, A. Delcourt, M. el Faham, H. Lowette, s. Morton, A. Müller, D. sahasransu, A.R. Tavernier, s. Van Doninck, W. Van Putte, s. Vannerom, D. Clerbaux, b. De Lentdecker, G. Favart, L. Hohov, D. Jaramillo, J. Lee, K. Mahdavikhorrami, M. Makarenko, I. Malara, A. Paredes, s. Pétré, L. Postiau, N. Thomas, L. Vanden bemden, M. Vander Velde, C. Vanlaer, P. Dobur, D. Knolle, J. Lamb.e.ht, L. Mestdach, G. Rendón, C. samalan, A. skovpen, K. Tytgat, M. Van Den bossche, N. Vermassen, b. Wezenb.e., L. benecke, A. bruno, G. bury, F. Caputo, C. David, P. Delaere, C. Donertas, I.s. Giammanco, A. Jaffel, K. Jain, sa. Lemaitre, V. Mondal, K. Taliercio, A. Tran, T.T. Vischia, P. Wertz, s. Alves, G.A. Coelho, e. Hensel, C. Moraes, A. Rebello Teles, P. Aldá Júnior, W.L. Alves Gallo Pereira, M. barroso Ferreira Filho, M. brandao Malbouisson, H. Carvalho, W. Chinellato, J. Da Costa, e.M. Da silveira, G.G. De Jesus Damiao, D. Dos santos sousa, V. Fonseca De souza, s. Martins, J. Mora Herrera, C. Mota Amarilo, K. Mundim, L. Nogima, H. santoro, A. silva Do Amaral, s.M. sznajder, A. Thiel, M. Vilela Pereira, A. bernardes, C.A. Calligaris, L. Fernandez Perez Tomei, T.R. Gregores, e.M. Mercadante, P.G. Novaes, s.F. Padula, sandra s. Aleksandrov, A. Antchev, G. Hadjiiska, R. Iaydjiev, P. Misheva, M. Rodozov, M. shopova, M. sultanov, G. Dimitrov, A. Ivanov, T. Litov, L. Pavlov, b. Petkov, P. Petrov, A. shumka, e. Thakur, s. Cheng, T. Javaid, T. Mittal, M. Yuan, L. Ahmad, M. bauer, G. Hu, Z. Lezki, s. Yi, K. Chen, G.M. Chen, H.s. Chen, M. Iemmi, F. Jiang, C.H. Kapoor, A. Liao, H. Liu, Z.-A. Milosevic, V. Monti, F. sharma, R. Tao, J. Thomas-Wilsker, J. Wang, J. Zhang, H. Z Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Vienna Austria Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Estadual Paulista Universidade Federal do ABC São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences Sofia Bulgaria University of Sofia Sofia Bulgaria Instituto De Alta Investigación Universidad de Tarapacá Casilla 7 D Arica Chile Beihang University Beijing China Department of Physics Tsinghua University Beijing China Institute of High Energy Physics Beijing China State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Sun Yat-Sen University Guangzhou China University of Science and Technology of China Hefei China Institute of Modern Physics Key Laboratory of Nuclear Physics Ion-beam Application (MOE) Fudan University Shanghai China Zhejiang University Zhejiang Hangzhou China Universidad de Los Andes Bogota Colombia Universidad de Antioquia Medellin Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Escuela Politecnica Nacional Quito Ecuador Universidad San Francisco de Quito Quito Ecuador Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Physics Cairo Egypt Center for High Energy Physics (CHEP-FU) Fayoum University El-Fayoum Egypt National Institute of Chemical Physics and Biophysics Tallinn Estonia Department of Physics Univer

Two-particle correlations are presented for Ks0, [Formula presented], and [Formula presented] strange hadrons as a function of relative momentum in lead-lead collisions at a nucleon-nucleon center-of-mass energy of 5.... 详细信息

Two-particle correlations are presented for Kssub>0sup>, [Formula presented], and [Formula presented] strange hadrons as a function of relative momentum in lead-lead collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV. The dataset corresponds to an integrated luminosity of 0.607nb−1sup> and was collected using the CMs detector at the CeRN LHC. These correlations are sensitive to quantum statistics and to final-state interactions between the particles. The source size extracted from the Kssub>0sup>Kssub>0sup> correlations is found to decrease from 4.6 to 1.6 fm in going from central to peripheral collisions. strong interaction scattering parameters (i.e., scattering length and effective range) are determined from the [Formula presented] and [Formula presented] (including their charge conjugates) correlations using the Lednický–Lyuboshitz model and are compared to theoretical and other experimental results. © 2024 CeRN for the benefit of the CMs Collaboration

关键词： CMs Femtoscopy Heavy ion scattering parameters V0

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Measurements of azimuthal anisotropy of nonprompt D0sup> mesons in PbPb collisions at sNNsub>=5.02TeV

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Physics Letters, section b: Nuclear, elementary Particle and High-energy Physics 2024年 850卷

作者： Tumasyan, A. Adam, W. Andrejkovic, J.W. bergauer, T. Chatterjee, s. Damanakis, K. Dragicevic, M. escalante Del Valle, A. Hussain, P.s. Jeitler, M. Krammer, N. Lechner, L. Liko, D. Mikulec, I. Paulitsch, P. Pitters, F.M. schieck, J. schöfbeck, R. schwarz, D. sonawane, M. Templ, s. Waltenberger, W. Wulz, C.-e. Darwish, M.R. Janssen, T. Kello, T. Rejeb sfar, H. Van Mechelen, P. bols, e.s. De Moor, A. Delcourt, M. el Faham, H. Lowette, s. Moortgat, s. Morton, A. Müller, D. sahasransu, A.R. Tavernier, s. Van Doninck, W. Vannerom, D. Clerbaux, b. De Lentdecker, G. Favart, L. Hohov, D. Jaramillo, J. Lee, K. Mahdavikhorrami, M. Makarenko, I. Malara, A. Paredes, s. Pétré, L. Postiau, N. Thomas, L. Vanden bemden, M. Vander Velde, C. Vanlaer, P. Dobur, D. Knolle, J. Lamb.e.ht, L. Mestdach, G. Rendón, C. samalan, A. skovpen, K. Tytgat, M. Van Den bossche, N. Vermassen, b. Wezenb.e., L. benecke, A. bruno, G. bury, F. Caputo, C. David, P. Delaere, C. Donertas, I.s. Giammanco, A. Jaffel, K. Jain, sa. Lemaitre, V. Mondal, K. Taliercio, A. Tran, T.T. Vischia, P. Wertz, s. Alves, G.A. Coelho, e. Hensel, C. Moraes, A. Rebello Teles, P. Aldá Júnior, W.L. Alves Gallo Pereira, M. barroso Ferreira Filho, M. brandao Malbouisson, H. Carvalho, W. Chinellato, J. Da Costa, e.M. Da silveira, G.G. De Jesus Damiao, D. Dos santos sousa, V. Fonseca De souza, s. Martins, J. Mora Herrera, C. Mota Amarilo, K. Mundim, L. Nogima, H. santoro, A. silva Do Amaral, s.M. sznajder, A. Thiel, M. Torres Da silva De Araujo, F. Vilela Pereira, A. bernardes, C.A. Calligaris, L. Fernandez Perez Tomei, T.R. Gregores, e.M. Mercadante, P.G. Novaes, s.F. Padula, sandra s. Aleksandrov, A. Antchev, G. Hadjiiska, R. Iaydjiev, P. Misheva, M. Rodozov, M. shopova, M. sultanov, G. Dimitrov, A. Ivanov, T. Litov, L. Pavlov, b. Petkov, P. Petrov, A. shumka, e. Thakur, s. Cheng, T. Javaid, T. Mittal, M. Yuan, L. Ahmad, M. bauer, G. Hu, Z. Lezki, s. Yi, K. Chen, G.M. Chen, H.s. Chen, M. Iemmi, F. Jiang, C.H. Kapoor, A. Liao, H. Liu, Z.-A. Milosevic, V. Monti, F. sharma, R. Tao, Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Vienna Austria Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Estadual Paulista Universidade Federal do ABC São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences Sofia Bulgaria University of Sofia Sofia Bulgaria Instituto De Alta Investigación Universidad de Tarapacá Casilla 7 D Arica Chile Beihang University Beijing China Department of Physics Tsinghua University Beijing China Institute of High Energy Physics Beijing China State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Sun Yat-Sen University Guangzhou China University of Science and Technology of China Hefei China Institute of Modern Physics Key Laboratory of Nuclear Physics Ion-beam Application (MOE) Fudan University Shanghai China Zhejiang University Zhejiang Hangzhou China Universidad de Los Andes Bogota Colombia Universidad de Antioquia Medellin Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Escuela Politecnica Nacional Quito Ecuador Universidad San Francisco de Quito Quito Ecuador Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Physics Cairo Egypt Center for High Energy Physics (CHEP-FU) Fayoum University El-Fayoum Egypt National Institute of Chemical Physics and Biophysics Tallinn Estonia Department of Physics Univer

Measurements of the elliptic (v2) and triangular (v3) azimuthal anisotropy coefficients are presented for [Formula presented] mesons produced in [Formula presented] hadron decays (nonprompt [Formula presented] mesons)... 详细信息

Measurements of the elliptic (v2sub>) and triangular (v3sub>) azimuthal anisotropy coefficients are presented for [Formula presented] mesons produced in [Formula presented] hadron decays (nonprompt [Formula presented] mesons) in lead-lead collisions at sNNsub>=5.02TeV. The results are compared with previously published charm meson anisotropies measured using prompt [Formula presented] mesons. The data were collected with the CMs detector in 2018 with an integrated luminosity of 0.58nb−1sup>. Azimuthal anisotropy is sensitive to the interactions of quarks with the hot and dense medium created in heavy ion collisions. Comparing results for prompt and nonprompt [Formula presented] mesons can assist in understanding the mass dependence of these interactions. The nonprompt results show lower magnitudes of v2sub> and v3sub> and weaker dependences on the meson transverse momentum and collision centrality than those found for prompt [Formula presented] mesons. The results are in agreement with theoretical predictions that include a mass dependence in the interactions of quarks with the medium. © 2024

关键词： CMs Flow Heavy flavor Heavy ions QPG

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Ob.e.vation of the bc+ Meson in Pb-Pb and pp Collisions at sNN=5.02 TeV and Measurement of its Nuclear Modification Factor

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Physical Review Letters 2022年第25期128卷 252301-252301页

作者： A. Tumasyan W. Adam J. W. Andrejkovic T. bergauer s. Chatterjee M. Dragicevic A. escalante Del Valle R. Frühwirth M. Jeitler N. Krammer L. Lechner D. Liko I. Mikulec P. Paulitsch F. M. Pitters J. schieck R. schöfbeck D. schwarz s. Templ W. Waltenberger C.-e. Wulz V. Chekhovsky A. Litomin V. Makarenko M. R. Darwish e. A. De Wolf T. Janssen T. Kello A. Lelek H. Rejeb sfar P. Van Mechelen s. Van Putte N. Van Remortel F. b.e.man e. s. bols J. D’Hondt M. Delcourt H. el Faham s. Lowette s. Moortgat A. Morton D. Müller A. R. sahasransu s. Tavernier W. Van Doninck P. Van Mulders D. beghin b. bilin b. Clerbaux G. De Lentdecker L. Favart A. Grebenyuk A. K. Kalsi K. Lee M. Mahdavikhorrami I. Makarenko L. Moureaux L. Pétré A. Popov N. Postiau e. starling L. Thomas M. Vanden bemden C. Vander Velde P. Vanlaer L. Wezenb.e. T. Cornelis D. Dobur J. Knolle L. Lamb.e.ht G. Mestdach M. Niedziela C. Roskas A. samalan K. skovpen M. Tytgat b. Vermassen M. Vit A. benecke A. bethani G. bruno F. bury C. Caputo P. David C. Delaere I. s. Donertas A. Giammanco K. Jaffel sa. Jain V. Lemaitre K. Mondal J. Prisciandaro A. Taliercio M. Teklishyn T. T. Tran P. Vischia s. Wertz G. A. Alves C. Hensel A. Moraes W. L. Aldá Júnior M. Alves Gallo Pereira M. barroso Ferreira Filho H. brandao Malbouisson W. Carvalho J. Chinellato e. M. Da Costa G. G. Da silveira D. De Jesus Damiao s. Fonseca De souza D. Matos Figueiredo C. Mora Herrera K. Mota Amarilo L. Mundim H. Nogima P. Rebello Teles A. santoro s. M. silva Do Amaral A. sznajder M. Thiel F. Torres Da silva De Araujo A. Vilela Pereira C. A. bernardes L. Calligaris T. R. Fernandez Perez Tomei e. M. Gregores D. s. Lemos P. G. Mercadante s. F. Novaes sandra s. Padula A. Aleksandrov G. Antchev R. Hadjiiska P. Iaydjiev M. Misheva M. Rodozov M. shopova G. sultanov A. Dimitrov T. Ivanov L. Litov b. Pavlov P. Petkov A. Petrov T. Cheng T. Javaid M. Mittal L. Yuan M. Ahmad G. bauer C. Dozen Z. Hu J. Martins Y. Wang K. Yi e. Chapon G. M. Chen H. s. Chen M. Chen F. Iemmi A. Kapoor D. Leggat H. Liao Z.-A. Liu V. Mi Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Vienna Austria Institute for Nuclear Problems Minsk Belarus Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Korea University Seoul Korea Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Estadual Paulista Universidade Federal do ABC São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences Sofia Bulgaria University of Sofia Sofia Bulgaria Beihang University Beijing China Department of Physics Tsinghua University Beijing China Institute of High Energy Physics Beijing China Massachusetts Institute of Technology Cambridge Massachusetts USA State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China The University of Kansas Lawrence Kansas USA Sun Yat-Sen University Guangzhou China Institute of Modern Physics and Key Laboratory of Nuclear Physics and Ion-beam Application (MOE)-Fudan University Shanghai China Zhejiang University Hangzhou China Zhejiang China Universidad de Los Andes Bogota Colombia Universidad de Antioquia Medellin Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Escuela Politecnica Nacional Quito Ecuador Universidad San Francisco de Quito Quito Ecuador Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Physics Cairo Egypt Center for High Energy Physics (CHEP-FU) Fayoum University El-Fayoum Egypt National Institute of Chemical Physics

The bc+ meson is ob.e.ved for the first time in heavy ion collisions. Data from the CMs detector are used to study the production of the bc+ meson in lead-lead (Pb-Pb) and proton-proton (pp) collisions at a center-of-mass energy per nucleon pair of sNN=5.02 TeV, via the bc+→(J/ψ→μ+μ−)μ+νμ decay. The bc+ nuclear modification factor, derived from the Pb-Pb–to–pp ratio of production cross sections, is measured in two bins of the trimuon transverse momentum and of the Pb-Pb collision centrality. The bc+ meson is shown to be less suppressed than quarkonia and most of the open heavy-flavor mesons, suggesting that effects of the hot and dense nuclear matter created in heavy ion collisions contribute to its production. This measurement sets forth a promising new probe of the interplay of suppression and enhancement mechanisms in the production of heavy-flavor mesons in the quark-gluon plasma.

关键词： Quark-gluon plasma bottom mesons Charmed mesons Hadron colliders

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