Charge Fluctuations along the QCD phase boundary
Abstract
We discuss the properties of the net--quark and isovector fluctuations along the chiral phase transition line in the plane spanned by temperature and baryon chemical potential. Our results are obtained in terms of the Nambu--Jona-Lasinio (NJL) model within the mean-field approximation. The model is formulated at the finite temperature and for non-vanishing net--quark and the isospin chemical potentials. The fermion interactions are controlled by the strength of the scalar and vector couplings in the iso-scalar and iso-vector channels of constituent quarks. We explore properties and differences in the behavior of the net--quark number and isovector susceptibilities for different values of thermal parameters near the phase transition. We argue that any non-monotonic behavior of the net--quark number susceptibility along the phase transition boundary is an excellent probe of the existence and the position of the second order endpoint in the QCD phase diagram.
Cite
@article{arxiv.hep-ph/0609211,
title = {Charge Fluctuations along the QCD phase boundary},
author = {K. Redlich and B. Friman and C. Sasaki},
journal= {arXiv preprint arXiv:hep-ph/0609211},
year = {2009}
}
Comments
8 pages, 4 figures, to appear in the proceedings of International Conference on Strangeness in Quark Matter (SQM2006), Los Angeles, California, 26-31 Mar 2006