Thermal evolution of the chiral condensate in SU(2) and SU(3) Chiral Perturbation Theory

Details Thermal evolution of the chiral condensate in SU(2) and SU(3) Chiral Perturbation Theory Thermal evolution of the chiral condensate in SU(2) and SU(3) Chiral Perturbation Theory

2002-10-03

arxiv.org/abs/hep-ph/0210061v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, two figures. To appear in the Proceedings of QCD02. Montpellier, France. July 2002

Scientific paper

10.1016/S0920-5632(03)01865-6

The temperature evolution of the chiral condensates in a gas made of pions, kaons and etas is studied within the framework of SU(2) and SU(3) Chiral Perturbation Theory. We describe the temperature dependence of the quark condensates by using the meson meson scattering phase shifts in a second order virial expansion. We find that the SU(3) formalism yields an extrapolated melting temperature for the non-strange condensates which is lower by about 20-30 MeV than within SU(2). In addition our results show that the strange condensate melting is slower than that of the non-strange, due to the different strange and non-strange quark masses.

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