Charge Fluctuations along the QCD phase boundary

Details Charge Fluctuations along the QCD phase boundary Charge Fluctuations along the QCD phase boundary

2006-09-20

arxiv.org/abs/hep-ph/0609211v1

J.Phys. G32 (2006) S283-S292

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 4 figures, to appear in the proceedings of International Conference on Strangeness in Quark Matter (SQM2006), Los Ang

Scientific paper

10.1088/0954-3899/32/12/S35

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.

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