Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2008-05-02
J.Phys.G35:104093,2008
Physics
High Energy Physics
High Energy Physics - Lattice
4 pages, 5 figures; to appear in the proceedings of the 20th International Conference on Ultra-Relativistic Nucleus-Nucleus Co
Scientific paper
10.1088/0954-3899/35/10/104093
We present results on baryon number, strangeness and electric charge fluctuations in QCD at non-zero density and temperature obtained from lattice calculations with almost physical quark masses. At vanishing chemical potential, i.e. under conditions almost realized at RHIC and the LHC, quartic fluctuations of net baryon number and strangeness are large in a narrow temperature interval characterizing the transition region from the low to the high temperature phase. Our results are based on Taylor expansions in light and strange quark chemical potentials, i.e. we rigorously compute corrections to bulk thermodynamic quantities at non vanishing chemical potential, by performing a Taylor expansion in $\mu/T$. We find non-monotonic behavior for the radius of convergence of this series, which could be a hint for a critical end-point in the ($T,\mu$)-plane.
for RBC-Bielefeld Collaboration
Schmidt Carl
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