
Physics 2002
The N_t=4 finite temperature phase transition for lattice QCD with a weak chiral 4fermion interactionAbstract: We study the finite temperature phase transition of lattice QCD with an irrelevant chiral 4fermion interaction and two massless quark flavours, on $8^3 \times 4$ and $12^2 \times 24 \times 4$ lattices. The strength of the 4fermion interaction was reduced to half the minimum value used in previous simulations, to study how the nature of this phase transition depends on this additional interaction. We find that the transition remains first order as the 4fermion coupling is reduced. Extending our earlier studies indicates that for sufficiently large 4fermion coupling, the transition is probably second order.
