Dense 2-color QCD towards continuum and chiral limits

Abstract

We study two-color QCD with two flavors of Wilson fermion as a function of quark chemical potential mu and temperature T, for two different lattice spacings and two different quark masses. We find that the quarkyonic region, where the behaviour of the quark number density and the diquark condensate are described by a Fermi sphere of almost free quarks distorted by a BCS gap, extends to larger chemical potentials with decreasing lattice spacing or quark mass. In both cases, the quark number density also approaches its non-interacting value. The pressure at low temperature is found to approach the Stefan-Boltzmann limit from below.

arXiv comment11 pages, 18 figures. Extended discussion of Polyakov loop and deconfinement temperature and of finite volume effects. Various minor modifications and clarifications. Matches version published in PRD

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