Critical point of QCD at finite T and mu, lattice results for physical quark masses
Abstract
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\not=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+/2 MeV and mu_{E} = 360+/40 MeV. For the critical temperature at mu = 0 we obtained T_{c} = 164+/2 MeV. This work extends our previous study [8] 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.
 Publication:

Journal of High Energy Physics
 Pub Date:
 April 2004
 DOI:
 10.1088/11266708/2004/04/050
 arXiv:
 arXiv:heplat/0402006
 Bibcode:
 2004JHEP...04..050F
 Keywords:

 Lattice Gauge Field Theories QCD Lattice QCD;
 High Energy Physics  Lattice;
 High Energy Physics  Phenomenology;
 Nuclear Theory
 EPrint:
 10 pages, 2 figures