Measurements of Chemical Potentials in Pb-Pb Collisions at $$\sqrt{s_{NN}}$$=5.02 TeV
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· Physical Review Letters
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- Université Clermont Auvergne
- Nuclear Physics Institute of the Czech Academy of Sciences
- CERN
- Dipartimento di Fisica dell’Università and Sezione INFN
- Dipartimento DISAT del Politecnico and Sezione INFN
- Dipartimento di Fisica e Astronomia dell’Università and Sezione INFN
- Homi Bhabha National Institute
- Aligarh Muslim University
- Korea Institute of Science and Technology Information
- P.J. Šafárik University
- Research Division and ExtreMe Matter Institute EMMI
- INFN
- Central China Normal University
- Universidad Nacional Autónoma de México
- University of Houston
- University of Bergen
- Johann Wolfgang Goethe-Universität Frankfurt
- Technische Universität München
- Universidad Autónoma de Puebla
- Horia Hulubei National Institute of Physics and Nuclear Engineering
- University of Derby
- Universität Münster
- Ruprecht-Karls-Universität Heidelberg
- Lawrence Berkeley National Laboratory
- Nantes Université
- Université Grenoble-Alpes
- Universidade de São Paulo (USP)
- University of Oslo
- Yale University
- University of Tokyo
- Sungkyunkwan University
- Gangneung-Wonju National University
- University of Science and Technology of China
- Indian Institute of Technology
- University of Jammu
- Université Paris-Saclay
- AGH University of Krakow
- Bose Institute
- Dipartimento Interateneo di Fisica ‘M. Merlin’ and Sezione INFN
- National and Kapodistrian University of Athens
- Gauhati University
- HUN-REN Wigner Research Centre for Physics
- STFC Daresbury Laboratory, Daresbury
- University of Liverpool
- Lund University Department of Physics
- Pontificia Universidad Católica del Perú
- University of Copenhagen
- Université de Strasbourg
- Universidad Autónoma de Sinaloa
- Institute of Space Science (ISS)
- Czech Technical University in Prague
- The University of Texas at Austin
- Università di Pavia; INFN
- Oak Ridge National Laboratory
- Pusan National University
- INFN; Università di Brescia
- Dipartimento Interateneo di Fisica ‘M. Merlin’ and Sezione INFN; Politecnico di Bari and Sezione INFN
- Stefan Meyer Institut für Subatomare Physik (SMI)
- National Research Foundation; University of the Witwatersrand
- Polish Academy of Sciences
- Università and Gruppo Collegato INFN
- Universitatea Nationala de Stiinta si Tehnologie Politehnica Bucuresti
- Université de Lyon
- Dipartimento di Fisica dell’Università and Sezione INFN; CERN
- Saha Institute of Nuclear Physics
- Central China Normal University; Research Division and ExtreMe Matter Institute EMMI
- Universidade Estadual de Campinas (UNICAMP)
- Inha University
- National institute for subatomic physics
- University of Tsukuba
- University of Birmingham
- INFN; Università del Piemonte Orientale
- Universidade Federal do ABC
- National Institute of Science Education and Research
- Università di Brescia
- Università and Gruppo Collegato INFN; CERN
- University of California
- Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear (CEADEN); CERN
- University of Cape Town
- Warsaw University of Technology
- Panjab University
- Technical University of Košice
- Comenius University Bratislava
- Hiroshima University
- National Research Foundation
- Saga University
- Chicago State University
- University of Kansas
- Universidade Federal do Rio Grande do Sul (UFRGS)
- INFN; Research Division and ExtreMe Matter Institute EMMI
- University of Tennessee
- Nagasaki Institute of Applied Science
- Wayne State University
- University of Split
- Institute for Gravitational and Subatomic Physics (GRASP)
- A.I. Alikhanyan National Science Laboratory (Yerevan Physics Institute) Foundation; CERN
- Yonsei University
- University of Jyväskylä
- Rheinische Friedrich-Wilhelms-Universität Bonn
- Western Norway University of Applied Sciences
- Centro de Investigación y de Estudios Avanzados (CINVESTAV)
- Johann-Wolfgang-Goethe Universität Frankfurt Institut für Informatik
- Ohio State University
- COMSATS University Islamabad
- University of California; Lawrence Berkeley National Laboratory
- National Research and Innovation Agency - BRIN
- China Institute of Atomic Energy
- Lawrence Berkeley National Laboratory; Oak Ridge National Laboratory; Universität Münster
- CERN; Research Division and ExtreMe Matter Institute EMMI
- Suranaree University of Technology
- Slovak Academy of Sciences
- KTO Karatay University
- University of Zagreb
- CERN; Warsaw University of Technology
- Zentrum für Technologie und Transfer (ZTT)
- Jeonbuk National University
- Sejong University
- California Polytechnic State University
- Sofia University
- CERN; Johann Wolfgang Goethe-Universität Frankfurt
- Slovak Academy of Sciences; University of Birmingham
- National Centre for Nuclear Research
- University of South-Eastern Norway
- CERN; Technische Universität München
- Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear (CEADEN)
- Research Division and ExtreMe Matter Institute EMMI; University of Science and Technology of China
- Fudan University
- Università di Messina; INFN
- INFN; Università degli Studi di Foggia
- University of the Witwatersrand
- Helsinki Institute of Physics (HIP)
- CERN; CERN
- Chungbuk National University
- China University of Geosciences
- Universidade Federal do Rio Grande do Sul (UFRGS); Nantes Université
- CERN; INFN
- Creighton University
- Oak Ridge National Laboratory; University of Tennessee
- National Nuclear Research Center
- Institute of Physics
- Eberhard-Karls-Universität Tübingen
- Nara Women’s University (NWU)
- Indian Institute of Technology; Research Division and ExtreMe Matter Institute EMMI
- CERN; Universität Münster
- Università di Messina; CERN; INFN
- National Academy of Sciences of Ukraine
- Università di Pavia
- Institute of Physics of the Czech Academy of Sciences
- Central China Normal University; INFN
This Letter presents the most precise measurement to date of the matter-antimatter imbalance at midrapidity in Pb-Pb collisions at a center-of-mass energy per nucleon pair $$\sqrt{s_{NN}}$$ = 5.02 TeV. Using the Statistical Hadronization framework, it is possible to obtain the value of the electric charge and baryon chemical potentials, μQ = -0.18 ± 0.90 MeV and μB = 0.71 ± 0.45 MeV, with unprecedented precision. A centrality-differential study of the antiparticle-to-particle yield ratios of charged pions, protons, Ω baryons, and light (hyper)nuclei is performed. These results indicate that the system created in Pb-Pb collisions at the LHC is on average baryon-free and electrically neutral at midrapidity.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Science (SC), High Energy Physics (HEP); USDOE Office of Science (SC), Nuclear Physics (NP)
- Contributing Organization:
- ALICE Collaboration
- Grant/Contract Number:
- AC02-05CH11231; AC05-00OR22725; FG02-96ER40982
- OSTI ID:
- 2437820
- Alternate ID(s):
- OSTI ID: 2538086
OSTI ID: 2477262
OSTI ID: 2568954
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 9 Vol. 133; ISSN 1079-7114; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English