Lattice QCD with 8 and 12 degenerate quark flavors

Details Lattice QCD with 8 and 12 degenerate quark flavors Lattice QCD with 8 and 12 degenerate quark flavors

2009-10-16

arxiv.org/abs/0910.3216v1

PoS LAT2009:049,2009

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, 8 figures, Talk presented at The XXVII International Symposium on Lattice Field Theory, LATTICE 2009 - Peking Univers

Scientific paper

We compare extensive simulations of QCD with 8 and 12 flavors of degenerate quarks, using the DBW2 gauge action, naive staggered fermions, and the rational hybrid Monte Carlo algorithm. A variety of values of the coupling constant, quark mass, and lattice size have been used. Our data suggests that, as the bare coupling is decreased, a rapid cross-over, which dramatically changes the lattice scale, exists with both 8 and 12 flavors. The scale change across this cross-over is much larger with 12 flavors than it is with 8 flavors. All of the observables we have measured, in both the zero and finite temperature systems, are consistent with a chiral symmetry breaking phase for the zero temperature theory on the weak coupling side of the rapid cross-over.

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