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We present the first results for lattice QCD at finite temperature $T$ andchemical potential $\mu$ with four flavors of Wilson quarks. The calculationsare performed using the imaginary chemical potential method at $\kappa=0$,0.001, 0.15, 0.165, 0.17 and 0.25, where $\kappa$ is the hopping parameter,related to the bare quark mass $m$ and lattice spacing $a$ by$\kappa=1/(2ma+8)$. Such a method allows us to do large scale Monte Carlosimulations at imaginary chemical potential $\mu=i \mu_I$. By analyticcontinuation of the data with $\mu_I < \pi T/3$ to real values of the chemicalpotential, we expect at each $\kappa\in [0,\kappa_{chiral}]$, a transition lineon the $(\mu, T)$ plane, in a region relevant to the search for quark gluonplasma in heavy-ion collision experiments. The transition is first order atsmall or large quark mass, and becomes a crossover at intermediate quark mass.Comment: Published versio

Phase diagram of QCD at finite temperature and chemical potential from lattice simulations with dynamical Wilson quarks