Confinement and chiral symmetry breaking, one or two critical points?

Details Confinement and chiral symmetry breaking, one or two critical points? Confinement and chiral symmetry breaking, one or two critical points?

2010-04-18

arxiv.org/abs/1004.3054v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 4 figures, contribution submitted to the XLVIII International Winter Meeting on Nuclear Physics, BORMIO2010 January 2

Scientific paper

We study the QCD phase diagram, in particular we study the critical points of the two main QCD phase transitions, confinement and chiral symmetry breaking. Confinement drives chiral symmetry breaking, and, due to the finite quark mass, at small density both transitions are a crossover, while they are a first or second order phase transition in large density. We study the QCD phase diagram with a quark potential model including both confinement and chiral symmetry. This formalism, in the Coulomb gauge hamiltonian formalism of QCD, is presently the only one able to microscopically include both a quark-antiquark confining potential and a vacuum condensate of quark-antiquark pairs. Our order parameters are the Polyakov loop and the quark mass gap. The confining potential is extracted from the Lattice QCD data of the Bielefeld group. We scan the QCD phase diagram for different quark masses, in order to address how the quark masses affect the critical point location in the phase diagram.

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