“…Thus the order of the phase transition and its universality class can be established by a comparison with the known critical exponents and the known scaling behavior. From such an analysis, there is indeed evidence of O(4) scaling for QCD with Wilson fermions [10,11,12,13], however, the expected scaling behavior has not been seen with staggered fermions [5,6,7]. Results with a modified QCD action with two flavors of staggered fermions suggest that current simulation volumes might be actually outside the finite-size scaling region [14].…”