Perturbative aspects of the phase diagram of QCD with heavy quarks⋆
1 Astro-Particule et Cosmologie (APC), CNRS UMR 7164, Université Paris 7 - Denis Diderot 10, rue Alice Domon et Léonie Duquet, 75205 Paris Cedex 13, France
2 CPHT, Ecole Polytechnique, CNRS, Université Paris-Saclay, F-91128 Palaiseau, France
Published online: 22 March 2017
We report on recent progress in the description of the phase diagram of QCD with heavy quarks at nonzero temperature and chemical potential in the context of a modified perturbative approach. The latter is based on a simple massive extension of the QCD Lagrangian in the Landau-DeWitt gauge, the background field generalization of the Landau gauge. Here, the background field plays the role of an order parameter for the center symmetry, relevant for confinement-deconfinement transition. One-loop results in this approach give a fairly accurate description of the phase diagram both at real and imaginary chemical potential. We comment on issues related to the sign problem in continuum approaches.
© The Authors, published by EDP Sciences, 2017
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