G. Endrodi, Z. Fodor, S. D. Katz, K. K. Szabo
Published 2007-10-04Version 1
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 $m_0 \lesssim 0.07 \cdot m_{phys}$ for $N_T=4$ and $m_0 \lesssim 0.12 \cdot m_{phys}$ for $N_T=6$ lattices.
Comments: Talk presented at the XXV International Symposium on Lattice Field Theory, July 30 - August 4 2007, Regensburg, Germany. 7 pages, 6 figures
Journal: PoSLAT2007:182,2007
First-order phase transition in dynamical 3-flavor QCD at imaginary isospin
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Results for the mass difference between the long- and short- lived K mesons for physical quark masses
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