title: Freeze-out parameters from electric charge and baryon number fluctuations: is there consistency?
abstract: Recent results for moments of multiplicity distributions of net protons and net-electric charge from the STAR Collaboration are compared to lattice QCD results for higher order fluctuations of baryon number and electric charge by the Wuppertal-Budapest Collaboration, with the purpose of extracting the freeze-out temperature and chemical potential. All lattice simulations are performed for a system of 2+1 dynamical quark flavors, at the physical mass for light and strange quarks; all results are continuum extrapolated. We show that it is possible to extract an upper value for the freeze-out temperature, as well as precise baryochemical potential values corresponding to the four highest collision energies of the experimental beam energy scan. Consistency between the freeze-out parameters obtained from baryon number and electric charge fluctuations is found. The freeze-out chemical potentials are now in agreement with the statistical hadronization model.
authors.affiliation: Department of Physics, Wuppertal University, Gauss Strasse 20, D-42119 Wuppertal, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Borsanyi
authors.affiliation: Department of Physics, Wuppertal University, Gauss Strasse 20, D-42119 Wuppertal, Germany and Institute for Theoretical Physics, Eötvös University, Pázmány P. sétány 1/A, H-1117 Budapest, Hungary and Jülich Supercomputing Centre, Forschungszentrum Jülich, D-52425 Jülich, Germany.
authors.forename: Z
authors.initials: Z
authors.lastname: Fodor
authors.affiliation: Institute for Theoretical Physics, Eötvös University, Pázmány P. sétány 1/A, H-1117 Budapest, Hungary and MTA-ELTE "Lendület" Lattice Gauge Theory Research Group, Pázmány P. sétány 1/A, H-1117 Budapest, Hungary.
authors.forename: S D
authors.initials: SD
authors.lastname: Katz
authors.affiliation: Department of Physics, Wuppertal University, Gauss Strasse 20, D-42119 Wuppertal, Germany and Jülich Supercomputing Centre, Forschungszentrum Jülich, D-52425 Jülich, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Krieg
authors.affiliation: Dipartimento di Fisica, Università di Torino and INFN, Sezione di Torino via Giuria 1, I-10125 Torino, Italy.
authors.forename: C
authors.initials: C
authors.lastname: Ratti
authors.affiliation: Department of Physics, Wuppertal University, Gauss Strasse 20, D-42119 Wuppertal, Germany and Jülich Supercomputing Centre, Forschungszentrum Jülich, D-52425 Jülich, Germany.
authors.forename: K K
authors.initials: KK
authors.lastname: Szabo