Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2001-04-18
Phys.Rev. D64 (2001) 034508
Physics
High Energy Physics
High Energy Physics - Lattice
32 pages, 11 figures. Revtex with postscript figures. Analysis of table II redone assuming 1/V finite volume effects
Scientific paper
10.1103/PhysRevD.64.034508
We have simulated lattice QCD with 2 flavours of massless staggered quarks. An irrelevant chiral 4-fermion interaction was added to the standard quark action to allow us to simulate at zero quark mass. Thermodynamics was studied on lattices of temporal extent 6. Clear evidence for a second order chiral transition was observed and the critical exponents $\beta_{mag}$, $\delta$, $\nu$ and $\gamma_{mag}$ were measured. These exponents did not agree with those expected by standard universality arguments. They were, however, consistent with tricritical behaviour. The $\pi$ and $\sigma$ screening masses were measured and showed clear evidence for chiral symmetry restoration at this transition.
Kogut John B.
Sinclair D. K.
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