abstract

• The Bs 0 and B%2b production yields are measured in PbPb collisions at a center-of-mass energy per nucleon pair of 5.02 TeV. The data sample, collected with the CMS detector at the LHC, corresponds to an integrated luminosity of 1.7 nb−1. The mesons are reconstructed in the exclusive decay channels B→s0J/ψ(μ%2bμ−)ϕ(K%2bK−) and B→%2bJ/ψ(μ%2bμ−)K%2b, in the transverse momentum range 7–50 GeV/c and absolute rapidity 0–2.4. The Bs 0 meson is observed with a statistical significance in excess of five standard deviations for the first time in nucleus-nucleus collisions. The measurements are performed as functions of the transverse momentum of the B mesons and of the PbPb collision centrality. The ratio of production yields of Bs 0 and B%2b is measured and compared to theoretical models that include quark recombination effects. © 2022 The Author(s)

authors

• CMS Collaboration
• Morelos Pineda Antonio

publication date

• 2022-01-01

funding provided via

• MDM-2015-0509; National Science Foundation, NSF; U.S. Department of Energy, USDOE; Alfred P. Sloan Foundation, APSF; Welch Foundation: C-1845; Hispanics in Philanthropy, HIP; Kavli Foundation; Maryland Ornithological Society, MOS; Alexander von Humboldt-Stiftung, AvH; Nvidia; Qatar National Research Fund, QNRF; Secretaría de Educación Pública, SEP; Türkiye Atom Enerjisi Kurumu, TAEK; Weston Havens Foundation; Louisiana Academy of Sciences, LAS; Missouri University of Science and Technology, MST; CERN; Thailand Center of Excellence in Physics; Cosmetic Surgery Foundation, CSF; Institute for the Promotion of Teaching Science and Technology, IPST; Science and Technology Facilities Council, STFC; European Research Council, ERC; European Cooperation in Science and Technology, COST: CA16108; Department of Science and Technology, Ministry of Science and Technology, India, डीएसटी; Council of Scientific and Industrial Research, India, CSIR; Ministry of Education - Singapore, MOE; Department of Atomic Energy, Government of India, DAE; Science Foundation Ireland, SFI; Helmholtz-Gemeinschaft, HGF; Deutsche Forschungsgemeinschaft, DFG: 390833306, 400140256 - GRK2497; Fundação de Amparo à Pesquisa do Estado de São Paulo, FAPESP; National Natural Science Foundation of China, NSFC; Ministerstvo Školství, Mládeže a Tělovýchovy, MŠMT; National Science Council, NSC; Fundação para a Ciência e a Tecnologia, FCT: CEECIND/01334/2018; Russian Foundation for Basic Research, РФФИ; Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, CAPES; Academy of Finland, AKA; Bundesministerium für Bildung und Forschung, BMBF; Chinese Academy of Sciences, CAS; Austrian Science Fund, FWF; Fonds De La Recherche Scientifique - FNRS, FNRS: 30820817; Russian Academy of Sciences, РАН; Belgian Federal Science Policy Office, BELSPO; Chulalongkorn University, CU; Fonds Wetenschappelijk Onderzoek, FWO; Agentschap voor Innovatie door Wetenschap en Technologie, IWT; Fonds pour la Formation à la Recherche dans l’Industrie et dans l’Agriculture, FRIA; Consejo Nacional de Ciencia y Tecnología, CONACYT; Ministerio de Economía y Competitividad, MINECO; Bulgarian National Science Fund, BNSF; Ministry of Education and Science of the Russian Federation, Minobrnauka; Ministry of Business, Innovation and Employment, MBIE; Conselho Nacional de Desenvolvimento Científico e Tecnológico, CNPq; Ministry of Science, ICT and Future Planning, MSIP; National Research Foundation of Korea, NRF; Joint Institute for Nuclear Research, JINR; Magyar Tudományos Akadémia, MTA: 123842, 123959, 124845, 124850, 125105, 128713, 128786, 129058; Instituto Nazionale di Fisica Nucleare, INFN; A.G. Leventis Foundation; National Science and Technology Development Agency, สวทช: Thailand; Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul, FAPERGS; Narodowe Centrum Nauki, NCN: 2014/15/B/ST2/03998, 2015/19/B/ST2/02861; Secretaría de Educación Superior, Ciencia, Tecnología e Innovación, SENESCYT; Stavros Niarchos Foundation, SNF; Universiti Malaya, UM; Ministerstwo Edukacji i Nauki, MNiSW; Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro, FAPERJ; Ministry of Science and Technology, Taiwan, MOST; National Academy of Sciences of Ukraine, NASU; Centre National de la Recherche Scientifique, CNRS; Latvijas Zinātnes Padome; Ministry of Education and Science, MES; Institute for Research in Fundamental Sciences, IPM; Benemérita Universidad Autónoma de Puebla, BUAP; Commissariat à l'Énergie Atomique et aux Énergies Alternatives, CEA; Secretaría de Estado de Investigación, Desarrollo e Innovación, SEIDI; Horizon 2020: 675440, 724704, 752730, 758316, 765710, 824093, 884104; European Regional Development Fund, ERDF; State Atomic Energy Corporation ROSATOM, ROSATOM; Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, CINVESTAV; Pakistan Atomic Energy Commission, PAEC; Ministry of Science,Technology and Research, MoSTR; Beijing Municipal Science and Technology Commission, BMSTC: Z191100007219010; Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie, BMBWF; Institut National de Physique Nucléaire et de Physique des Particules, IN2P3; Nemzeti Kutatási, Fejlesztési és Innovaciós Alap, NKFIA; National Research Center Kurchatov Institute, NRC KI  Grant

published in

• Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics  Journal

keywords

• B mesons; CMS; Hadronization; Heavy flavor; Quark gluon plasma

Digital Object Identifier (DOI)

• 10.1016/j.physletb.2022.137062

PubMed ID

start page

end page

volume

• 829

issue