RT Journal Article
T1 Chiral condensate thermal evolution at finite baryon chemical potential within chiral perturbation theory
A1 García Martín, R
A1 Peláez Sagredo, José Ramón
AB 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- eson interactions are described within chiral perturbation theory and the pion-nucleon interaction by means of heavy baryon chiral perturbation theory, both at one loop, and nucleon-nucleon interactions can be safely neglected within our hadronic gas domain of validity. Together with the virial expansion, this provides a 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. We have also estimated  uncertainties due to chiral parameters, heavier hadrons, and higher orders through unitarized chiral perturbation theory.
PB Amer Physical Soc
SN 1550-7998
YR 2006
FD 2006-11
LK https://hdl.handle.net/20.500.14352/51725
UL https://hdl.handle.net/20.500.14352/51725
LA eng
NO ©2006 The American Physical Society.Research partially funded by Spanish CICYT Contract No. FPA2005-02327, as well as Banco Santander/ Complutense Contract No. PR27/05-13955-BSCH. J. R. P. research is also partially funded by CICYT Contract No. BFM2003-00856 and is part of the EU integrated infrastructure initiative HADRONPHYSICS PROJECT, under Contract No. RII3-CT-2004-506078.
NO Spanish CICYT
NO Banco Santander/ Complutense
NO EU Integrated Infrastructure Initiative Hadron Physics Project
DS Docta Complutense
RD 18 abr 2025