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Hot quark matter with an axial chemical potential

Raoul Gatto1 and Marco Ruggieri2

  • 1Departement de Physique Theorique, Universite de Geneve, CH-1211 Geneve 4, Switzerland
  • 2Department of Physics and Astronomy, University of Catania, Via S. Sofia 64, I-95125 Catania, Italy

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Phys. Rev. D 85, 054013 – Published 16 March, 2012

DOI: https://doi.org/10.1103/PhysRevD.85.054013

Abstract

We analyze the phase diagram of hot quark matter in presence of an axial chemical potential, μ5. The latter is introduced to mimic the chirality transitions induced, in hot quantum chromodynamics, by the strong sphaleron configurations. In particular, we study the curvature of the critical line at small μ5, the effects of a finite quark mass and of a vector interaction. Moreover, we build the mixed phase at the first order phase transition line and draw the phase diagram in the chiral density and temperature plane. We finally compute the full topological susceptibility in presence of a background of topological charge.

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Phys. Rev. D 85, 054013– Published 16 March, 2012
  • Received 27 October 2011

© 2012 American Physical Society

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