Four-quark condensates and chiral symmetry restoration in a resonance gas model

Details Four-quark condensates and chiral symmetry restoration in a resonance gas model Four-quark condensates and chiral symmetry restoration in a resonance gas model

2006-04-06

arxiv.org/abs/hep-ph/0604058v1

J.Phys. G32 (2006) 2199-2218

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages

Scientific paper

10.1088/0954-3899/32/11/013

As an alternative to the two-quark condensate we propose a specific four-quark condensate as an order parameter of chiral symmetry restoration. We show that this four-quark condensate is closer connected to observable quantities. Within a resonance gas model we calculate the in-medium changes of two- and four-quark condensate as functions of temperature and baryo-chemical potential. In this way we estimate the line of chiral symmetry restoration in the temperature-potential plane and also as a function of energy and baryon density. It turns out that the line determined from the vanishing of the four-quark condensate is extremely constant as a function of the energy density.

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