Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-11-07
Physics
High Energy Physics
High Energy Physics - Phenomenology
3 Pages. Talk presented in the IVth International Conference on Quarks and Nuclear Physics. Madrid, Spain. 5th-10th June 2006
Scientific paper
We present a model independent study of the chiral condensate evolution in a hadronic gas, in terms of temperature and baryon chemical potential. The meson-meson interactions are described within Chiral Perturbation Theory and the pion-nucleon interaction by means of Heavy Baryon Chiral Perturbation Theory, both at one loop. Together with the virial expansion, this provides a model independent systematic expansion at low temperatures and chemical potentials, which includes the physical quark masses. This can serve as a guideline for further studies on the lattice. We also obtain estimates of the critical line of temperature and chemical potential where the chiral condensate melts, which systematically lie somewhat higher than recent lattice calculations but are consistent with several hadronic models.
Martin Rebecca G.
Pelaez Jose Ramon
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