期刊
PHYSICS LETTERS B
卷 795, 期 -, 页码 15-21出版社
ELSEVIER
DOI: 10.1016/j.physletb.2019.05.013
关键词
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资金
- U.S. Department of Energy, Office of Science, Office of Nuclear Physics [DE-SC0012704]
- Beam Energy Scan Theory (BEST) Topical Collaboration
- Scientific Discovery through Advance Computing (ScIDAC) award Computing the Properties of Matter with Leadership Computing Resources - Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) [315477589-TRR 211, 05P18PBCA1]
- German Bundesministerium fur Bildung und Forschung
- National Natural Science Foundation of China [11775096, 11535012]
- Early Career Research Award of the Science and Engineering Research Board of the Government of India
- Ramanujan Fellowship of the Department of Science and Technology, Government of India
- Oak Ridge Leadership Computing Facility, a DOE Office of Science User Facility [DE-AC05-00OR22725]
- National Energy Research Scientific Computing Center, a U.S. Department of Energy Office of Science User Facility [DE-AC02-05CH11231]
- Argonne Leadership Computing Facility, a U.S. Department of Energy Office of Science User Facility [DE-AC02-06CH11357]
We present results for pseudo-critical temperatures of QCD chiral crossovers at zero and non-zero values of baryon (B), strangeness (S), electric charge (Q), and isospin (I) chemical potentials mu(X=B,Q,S,I). The results were obtained using lattice QCD calculations carried out with two degenerate up and down dynamical quarks and a dynamical strange quark, with quark masses corresponding to physical values of pion and kaon masses in the continuum limit. By parameterizing pseudo-critical temperatures as T-c(mu(x)) = T-c(0)[1-kappa(X)(2)(mu(X)/T-c(0))(2) - kappa(X)(4)(mu(X)/T-c(0))(4)], we determined kappa(X)(2) and kappa(X)(4) from Taylor expansions of chiral observables in mu(X). We obtained a precise result for T-c(0) = (156.5 +/- 1.5) MeV. For analogous thermal conditions at the chemical freeze-out of relativistic heavy-ion collisions, i.e., mu(S)(T, mu(B)) and mu(Q)(T, mu(B)) fixed from strangeness-neutrality and isospin-imbalance, we found kappa(B)(2) = 0.012(4) and kappa(B)(4) = 0.000(4). For mu(B) less than or similar to 300 MeV, the chemical freeze-out takes place in the vicinity of the QCD phase 4 boundary, which coincides with the lines of constant energy density of 0.42(6) GeV/fm(3) and constant entropy density of 3.7(5) fm(-3). (C) 2019 The Author(s). Published by Elsevier B.V.
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