出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：The finite temperature QCD transition for physical quark masses is a crossover. For smaller
quark masses a first-order phase transition is expected. Using Symanzik improved gauge and
stout improved fermion action for 2+1 flavour staggered QCD we give estimates/bounds for the
phase line separating the first-order region from the crossover one. The calculations are carried
out on two different lattice spacings. Our conclusion for the critical mass is m0 . 0.07 ·mphys for
NT = 4 and m0 . 0.12 ·mphys for NT = 6 lattices.
