Net-baryon number fluctuations in (2+1)-flavor QCD

Details Net-baryon number fluctuations in (2+1)-flavor QCD Net-baryon number fluctuations in (2+1)-flavor QCD

2010-07-29

arxiv.org/abs/1007.5164v1

Prog.Theor.Phys.Suppl.186:563-566,2010

Physics

High Energy Physics

High Energy Physics - Lattice

4 pages; invited talk presented at 'New Frontiers in QCD 2010' at the Yukawa Institute for Theoretical Physics, Kyoto, Japan,

Scientific paper

10.1143/PTPS.186.563

We present a lattice study of net-baryon number fluctuations in (2+1)-flavor QCD. The results are based on a Taylor expansion of the pressure with respect to the baryon chemical potential. We calculate higher moments of the net-baryon number fluctuations and compare with the corresponding resonance gas results. We find that for temperature below 0.9T_c the fluctuations seem to agree with the hadron resonance gas predictions. Close to T_c, higher moments are increasingly more sensitive to the critical behavior of the QCD phase transition. Furthermore, we estimate the radius of convergence of the Taylor series as well as the curvature of the transition line in the temperature chemical potential plane.

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