Holographic QCD phase diagram with critical point from Einstein-Maxwell-dilaton dynamics
Holographic QCD phase diagram with critical point from Einstein-Maxwell-dilaton dynamics
Knaute, J.; Yaresko, R.; Kämpfer, B.
Abstract
Supplementing the holographic Einstein-Maxwell-dilaton model of [O. DeWolfe, S.S. Gubser, C. Rosen, Phys. Rev. D83 (2011) 086005; O. DeWolfe, S.S. Gubser, C. Rosen, Phys. Rev. D84 (2011) 126014] by input of lattice QCD data for 2+1 flavors and physical quark masses for the equation of state and quark number susceptibility at zero baryo-chemical potential we explore the resulting phase diagram over the temperature-chemical potential plane. A first-order phase transition sets in at a temperature of about 112 MeV and a baryo-chemical potential of 989 MeV. We estimate the accuracy of the critical point position in the order of approximately 5% by considering different low-temperature asymptotics for the second-order quark number susceptibility. The critical pressure as a function of the temperature has a positive slope, i.e. the entropy per baryon jumps up when crossing the phase border line from larger values of temperature/baryo-chemical potential, thus classifying the phase transition as a gas-liquid one. The updated holographic model exhibits in- and outgoing isentropes in the vicinity of the first-order phase transition.
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WWW-Beitrag
https://arxiv.org/abs/1702.06731 -
Physics Letters B 778(2018), 419
DOI: 10.1016/j.physletb.2018.01.053
Cited 33 times in Scopus
Permalink: https://www.hzdr.de/publications/Publ-25195