In this letter we give the equation of state of QCD at finite temperatures and densities. The recently proposed overlap improving multi-parameter reweighting technique is used to determine observables at nonvanishing chemical potentials. Our results are obtained by studying n_f=2+1 dynamical staggered quarks with semi-realistic masses on N_t=4 lattices.
@article{arxiv.hep-lat/0208078,
title = {The QCD equation of state at nonzero densities: lattice result},
author = {Z. Fodor and S. D. Katz and K. K. Szabo},
journal= {arXiv preprint arXiv:hep-lat/0208078},
year = {2008}
}