期刊
PHYSICAL REVIEW C
卷 93, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.93.011901
关键词
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资金
- Office of Nuclear Physics in the Office of Science of the Department of Energy (U.S.A)
- National Science Foundation (U.S.A)
- Abilene Christian University Research Council (U.S.A)
- Research Foundation of SUNY (U.S.A)
- Dean of the College of Arts and Sciences, Vanderbilt University (U.S.A)
- Ministry of Education, Culture, Sports, Science, and Technology (Japan)
- Japan Society for the Promotion of Science (Japan)
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (Brazil)
- Natural Science Foundation of China (People's Republic of China)
- Ministry of Science, Education, and Sports (Croatia)
- Ministry of Education, Youth and Sports (Czech Republic)
- Centre National de la Recherche Scientifique (France)
- Commissariat a l'Energie Atomique (France)
- Institut National de Physique Nucleaire et de Physique des Particules (France)
- Bundesministerium fur Bildung und Forschung (Germany)
- Deutscher Akademischer Austausch Dienst (Germany)
- Alexander von Humboldt Stiftung (Germany)
- National Science Fund (Hungary)
- OTKA (Hungary)
- Karoly Robert University College (Hungary)
- Ch. Simonyi Fund (Hungary)
- Department of Atomic Energy and Department of Science and Technology (India)
- Israel Science Foundation (Israel)
- Basic Science Research Program through NRF of the Ministry of Education (Korea)
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (Brazil)
- Physics Department (Pakistan)
- Lahore University of Management Sciences (Pakistan)
- Ministry of Education and Science (Russia)
- Russian Academy of Sciences (Russia)
- Federal Agency of Atomic Energy (Russia)
- VR (Sweden)
- Wallenberg Foundation (Sweden)
- U.S. Civilian Research and Development Foundation for the Independent States of the Former Soviet Union
- Hungarian American Enterprise Scholarship Fund
- US-Israel Binational Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [1506489] Funding Source: National Science Foundation
- Grants-in-Aid for Scientific Research [26610071, 15H03664, 24105004] Funding Source: KAKEN
We report the measurement of cumulants (C-n,n = 1, ..., 4) of the net-charge distributions measured within pseudorapidity (vertical bar eta vertical bar < 0.35) in Au + Au collisions at root s(NN) = 7.7-200 GeV with the PHENIX experiment at the Relativistic Heavy Ion Collider. The ratios of cumulants (e.g., C-1/C-2, C-3/C-1) of the net-charge distributions, which can be related to volume independent susceptibility ratios, are studied as a function of centrality and energy. These quantities are important to understand the quantum-chromodynamics phase diagram and possible existence of a critical end point. The measured values are very well described by expectation from negative binomial distributions. We do not observe any nonmonotonic behavior in the ratios of the cumulants as a function of collision energy. The measured values of C-1/C-2 and C-3/C-1 can be directly compared to lattice quantum-chromodynamics calculations and thus allow extraction of both the chemical freeze-out temperature and the baryon chemical potential at each center-of-mass energy. The extracted baryon chemical potentials are in excellent agreement with a thermal-statistical analysis model.
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