The phase diagram of QCD at small chemical potentials

Details The phase diagram of QCD at small chemical potentials The phase diagram of QCD at small chemical potentials

2007-12-04

arxiv.org/abs/0712.0434v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages

Scientific paper

We investigate the phase diagram of QCD at small chemical potentials, ie, when chiral and flavour symmetry breaking involves the pairing of a quark and an antiquark. The phase diagram of two-flavour QCD at small chemical potentials involves chiral symmetry restoration and charged pion condensation. We extend previous studies of the topology of the phase diagram, in sections with high degree of symmetry, to the physical case of fully broken flavour symmetry, using generic thermodynamic arguments. We argue that the extension is unique and present the result. In three flavour QCD the phase diagram for chiral symmetry restoration is less well constrained. However, we argue that present lattice data allows just two different phase diagrams, which we discuss.

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