THE FINITE TEMPERATURE PHASE TRANSITION IN FOUR FLAVOUR QCD ON AN
$8\times 12^3$ LATTICE
$MT_c$ Collaboration
R.V. Gavai, Sourendu Gupta, A. Irb\"ack, F. Karsch, S. Meyer,
B. Petersson, H. Satz and H.W. Wyld
Abstract: We present results of a numerical study of lattice QCD with
four dynamical flavours of staggered fermions, performed by using a
hybrid Monte Carlo algorithm on an $8\times 12^3$ lattice. We find a
rapid change in the average value of the Polyakov loop at
$\beta_c=5.25\pm 0.025$ for a quark mass $ma=0.025$; at this mass
value, the behaviour of the chiral order parameter, $<\bar\psi\psi>$,
does not yet allow an independent determination of the transition
point. Using existing hadron mass calculations, the value of $\beta_c$
we obtained here would lead to a transition temperature
$T\sim 100$ MeV.