The Phase Diagram of the Quark-Meson Model
By B. Schaefer, J. Wambach. 2004
191 citations recorded by the source corpus.
Abstract Within the proper-time renormalization group approach, the chiral phase diagram of a two-flavor quark–meson model is studied. In the chiral limit, the location of the tricritical point which is linked to a Gaussian fixed point, is determined. For quark chemical potentials smaller than the tricritical one the second-order phase transition belongs to the O ( 4 ) universality class. For temperatures below the tricritical one we find initially a weak first-order phase transition which is commonly seen in model studies and also in recent lattice simulations. In addition, below temperatures of T ≲ 17 MeV we find two phase transitions. The chiral restoration transition is initially also of first-order but turns into a second-order transition again. This leads to the possibility that there may be a “second tricritical” point in the QCD phase diagram in the chiral limit.
Subfields: Geophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/ee3d3df592866322fe599e37406a52f7be51b241
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Citations in the corpus
- The nonperturbative functional renormalization group and its applications (2020, background): “dependence of the chiral phase structure has been considered in [802, 879, 882, 883, 889–922], superfluid phases with gapless fermionic excitations at finite (isospin) density and their counterparts in non-relativistic systems have been studied in [923, 924].”
- QCD at finite temperature and chemical potential from Dyson–Schwinger equations (2018, background): “ritical physics at and around T c. In effective chiral theories, such as the the PQM model, these degrees of freedom are built in from the start and therefore the critical physics is extracted easily [199,417] and even the question of the fate of the U A(1) anomaly can be discussed [172]. On the oth”