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 nf=2+1 staggered quarks of physical masses on Lt = 4 lattices. Our result for the critical point is TE = 162+/-2 MeV and muE = 360+/-40 MeV. For the critical temperature at mu = 0 we obtained Tc = 164+/-2 MeV. This work extends our previous study [8] by two means. It decreases the light quark masses (mu,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 mu,d decreased muE. Note, that the continuum extrapolation is still missing.
- Publication:
-
Journal of High Energy Physics
- Pub Date:
- April 2004
- DOI:
- 10.1088/1126-6708/2004/04/050
- arXiv:
- arXiv:hep-lat/0402006
- Bibcode:
- 2004JHEP...04..050F
- Keywords:
-
- Lattice Gauge Field Theories QCD Lattice QCD;
- High Energy Physics - Lattice;
- High Energy Physics - Phenomenology;
- Nuclear Theory
- E-Print:
- 10 pages, 2 figures