Correlations and fluctuations from lattice QCD
Szabolcs Borsanyi, Zoltan Fodor, Sandor D. Katz, Stefan Krieg, Claudia, Ratti, Kalman K. Szabo (Wuppertal-Budapest Collaboration)
TL;DR
This paper reports new lattice QCD results on quark number susceptibilities across a range of temperatures, using improved actions and physical quark masses to enable continuum extrapolation.
Contribution
It provides the first continuum-extrapolated results for flavor diagonal and non-diagonal quark susceptibilities in 2+1 flavor QCD at finite temperature.
Findings
Results cover 120-400 MeV temperature range.
Continuum extrapolated susceptibilities with controlled discretization errors.
Use of physical quark masses and improved lattice actions.
Abstract
We present the new results of the Wuppertal-Budapest lattice QCD collaboration on flavor diagonal and non-diagonal quark number susceptibilities with 2+1 staggered quark flavors, in a temperature regime between 120 and 400 MeV. A Symanzik improved gauge and a stout-link improved staggered fermion action is utilized; the light and strange quark masses are set to their physical values. Lattices with are used. We perform a continuum extrapolation of those observables for which the scaling regime is reached, and discretization errors are under control.
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