Curvature of the freeze-out line in heavy ion collisions
- Univ. of Iowa, Iowa City, IA (United States)
- Central China Normal Univ., Wuhan (China)
- Univ. of Bielefeld (Germany)
- Univ. of Bielefeld (Germany); Brookhaven National Lab. (BNL), Upton, NY (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States); Univ. of Tsukuba (Japan)
- Univ. of Regensburg (Germany)
- Indiana Univ., Bloomington, IN (United States)
Here, we calculate the mean and variance of net-baryon number and net-electric charge distributions from quantum chromodynamics (QCD) using a next-to-leading order Taylor expansion in terms of temperature and chemical potentials. Moreover, these expansions with experimental data from STAR and PHENIX are compared, we determine the freeze-out temperature in the limit of vanishing baryon chemical potential, and, for the first time, constrain the curvature of the freeze-out line through a direct comparison between experimental data on net-charge fluctuations and a QCD calculation. We obtain a bound on the curvature coefficient, κ$^f$$$$_2$$<0.011, that is compatible with lattice QCD results on the curvature of the QCD transition line.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- Grant/Contract Number:
- SC00112704; AC05-00OR22725; SC0012704
- OSTI ID:
- 1254818
- Alternate ID(s):
- OSTI ID: 1236404
- Report Number(s):
- BNL-112232-2016-JA; PRVDAQ; KB0301020
- Journal Information:
- Physical Review D, Vol. 93, Issue 1; ISSN 2470-0010
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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