Raoul Gatto, Marco Ruggieri
We analyze the phase diagram of hot quark matter in presence of an axial
chemical potential, $\mu_5$. 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 $\mu_5$, 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.
View original:
http://arxiv.org/abs/1110.4904
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