FLAVOUR DEGREES OF FREEDOM AND THE TRANSITION TEMPERATURE IN QCD
$MT_c$ Collaboration
R.V. Gavai, Sourendu Gupta, A. Irb\"ack, F. Karsch, S. Meyer,
B. Petersson, H. Satz and H.W. Wyld
Abstract: We study the finite temperature transition in QCD with four
flavours of dynamical quarks. Our simulation is performed on an
$8\times 16^3$ lattice for quarks of mass $ma=0.01$. At the coupling
$\beta_c=5.15$, we find long-lived metastable states, as well as an
abrupt change in the entropy density, suggesting a first order phase
transition. Using presently available results from corresponding
calculations of the hadron masses and the chiral condensate, this
gives us a transition temperature $T_c\approx 100$ MeV, which is a
factor two lower than the transition temperature found in quenched QCD.