Journal Article

PreJuSER-19790

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png The QCD phase diagram at nonzero quark density

Endrödi, G. ; Fodor, Z.FZJ* ; Katz, S. D. ; Szabó, K. K.

2011
Springer Berlin

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Please use a persistent id in citations: doi:10.1007/JHEP04(2011)001

Abstract: We determine the phase diagram of QCD on the mu - T plane for small to moderate chemical potentials. Two transition lines are defined with two quantities, the chiral condensate and the strange quark number susceptibility. The calculations are carried out on N-t = 6, 8 and 10 lattices generated with a Symanzik improved gauge and stout-link improved 2+1 flavor staggered fermion action using physical quark masses. After carrying out the continuum extrapolation we find that both quantities result in a similar curvature of the transition line. Furthermore, our results indicate that in leading order the width of the transition region remains essentially the same as the chemical potential is increased.

Keyword(s): J ; Lattice QCD (auto) ; Lattice Gauge Field Theories (auto) ; Lattice Quantum Field Theory (auto)

Note: We thank T. Csorgo, C. Schroeder and G. I. Veres for useful discussion. Computations were performed on the BlueGene at FZ Julich and on clusters at Wuppertal and Budapest. This work is supported in part by DFG grants SFB-TR 55, FO 502/1-2 and the EU grant (FP7/2007-2013)/ERC n<SUP>o</SUP>208740.

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Contributing Institute(s):

1. Jülich Supercomputing Centre (JSC)

Research Program(s):

1. Scientific Computing (FUEK411) (FUEK411)
2. 411 - Computational Science and Mathematical Methods (POF2-411) (POF2-411)
3. QCDTHERMO - QCD thermodynamics on the lattice (208740) (208740)

Appears in the scientific report 2011

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