Critical point of QCD at finite T and μ, lattice results for physical quark masses

Details Critical point of QCD at finite T and μ, lattice results for physical quark masses Critical point of QCD at finite T and μ, lattice results for physical quark masses

2004-02-08

arxiv.org/abs/hep-lat/0402006v1

JHEP 0404 (2004) 050

Physics

High Energy Physics

High Energy Physics - Lattice

10 pages, 2 figures

Scientific paper

10.1088/1126-6708/2004/04/050

A critical point (E) is expected in QCD on the temperature (T) versus baryonic chemical potential (\mu) plane. Using a recently proposed lattice method for \mu \neq 0 we study dynamical QCD with n_f=2+1 staggered quarks of physical masses on L_t=4 lattices. Our result for the critical point is T_E=162 \pm 2 MeV and \mu_E= 360 \pm 40 MeV. For the critical temperature at \mu=0 we obtained T_c=164 \pm 2 MeV. This work extends our previous study [Z. Fodor and S.D.Katz, JHEP 0203 (2002) 014] by two means. It decreases the light quark masses (m_{u,d}) by a factor of three down to their physical values. Furthermore, in order to approach the thermodynamical limit we increase our largest volume by a factor of three. As expected, decreasing m_{u,d} decreased \mu_E. Note, that the continuum extrapolation is still missing

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