Production of ϒ(nS) mesons in Pb + Pb and pp collisions at 5.02 TeV
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American Physical Society
Aad, G., Abbott, B., Abbott, D. C., Abeling, K., Abidi, S. H., Aboulhorma, A., ... & Ballabene, E. (2023). Production of Υ (n S) mesons in Pb+ Pb and p p collisions at 5.02 TeV. Physical Review C, 107(5), 054912.[https://doi.org/10.1103/PhysRevC.107.054912]
SponsorshipANPCyT; YerPhI, Armenia; Australian Research Council; BMWFW, Austria; Austrian Science Fund (FWF); Azerbaijan National Academy of Sciences (ANAS); Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ); Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP); Natural Sciences and Engineering Research Council of Canada (NSERC); Canada Foundation for Innovation; National Natural Science Foundation of China (NSFC); MEYS CR, Czech Republic; National Research Foundation of Korea; Danish Natural Science Research Council; Centre National de la Recherche Scientifique (CNRS); CEA-DRF/IRFU, France; Federal Ministry of Education & Research (BMBF); Max Planck Society; Hong Kong SAR, China; Israel Science Foundation; Istituto Nazionale di Fisica Nucleare (INFN); Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT); Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT) Japan Society for the Promotion of Science; CNRST, Morocco; RCN, Norway; MEiN, Poland; Fundacao para a Ciencia e a Tecnologia (FCT); MNE/IFA, Romania; Ministry of Education, Science & Technological Development, Serbia; MSSR, Slovakia; Slovenian Research Agency - Slovenia; MIZS, Slovenia; Spanish Government; Wallenberg Foundation, Sweden; SERI, Switzerland; Ministry of Science and Technology, Taiwan; United States Department of Energy (DOE); National Science Foundation (NSF); BCKDF, Canada; CANARIE, Canada; Compute Canada, Canada; Czech Republic Government PRIMUS 21/SCI/017 UNCE SCI/013; COST, European Union; European Union (EU) European Research Council (ERC); European Union (EU) Marie Curie Actions; Horizon 2020, European Union; European Union (EU) Marie Curie Actions; Agence Nationale de la Recherche (ANR); German Research Foundation (DFG); Alexander von Humboldt Foundation; Herakleitos programme - EU-ESF, Greece; Thales Group; Aristeia programme - EU-ESF, Greece; Greek NSRF, Greece; BSF-NSF, Israel; MINERVA, Israel; Norwegian Financial Mechanism 2014-2021, Norway; NCN, Poland; Polish National Agency for Academic Exchange (NAWA); La Caixa Banking Foundation, Spain; CERCA Programme Generalitat de Catalunya, Spain; PROMETEO Programme Generalitat Valenciana, Spain; GenT Programme Generalitat Valenciana, Spain; Goran Gustafssons Stiftelse, Sweden; Royal Society; Leverhulme Trust; UK Research & Innovation (UKRI) Science & Technology Facilities Council (STFC); TENMAK, Turkiye; Canton of Geneva, Switzerland; Canton of Bern, Switzerland; Swiss National Science Foundation (SNSF); SRC, Sweden; DSI/NRF, South Africa; Netherlands Organization for Scientific Research (NWO) Netherlands Government; Benoziyo Center, Israel; RGC, China; GSRI, Greece; HGF, Germany; SRNSFG, Georgia; Minciencias, Colombia; Ministry of Science and Technology, China; Chinese Academy of Sciences; ANID, Chile; CERN; NRC, Canada
A measurement of the production of vector bottomonium states, ϒ(1S), ϒ(2S), and ϒ(3S), in Pb + Pb and pp collisions at a center-of-mass energy per nucleon pair of 5.02 TeV is presented. The data correspond to integrated luminosities of 1.38 nb−1 of Pb + Pb data collected in 2018, 0.44 nb−1 of Pb + Pb data collected in 2015, and 0.26 fb−1 of pp data collected in 2017 by the ATLAS detector at the Large Hadron Collider. The measurements are performed in the dimuon decay channel for transverse momentum pμμ T < 30 GeV, absolute rapidity |yμμ| < 1.5, and Pb + Pb event centrality 0–80%. The production rates of the three bottomonium states in Pb + Pb collisions are compared with those in pp collisions to extract the nuclear modification factors as functions of event centrality, pμμ T , and |yμμ|. In addition, the suppression of the excited states relative to the ground state is studied. The results are compared with theoretical model calculations.