Finite Temperature Transition in Two Flavor QCD with Renormalization Group Improved Action

Details Finite Temperature Transition in Two Flavor QCD with Renormalization Group Improved Action Finite Temperature Transition in Two Flavor QCD with Renormalization Group Improved Action

1994-12-10

arxiv.org/abs/hep-lat/9412054v1

Nucl.Phys.Proc.Suppl. 42 (1995) 502-504

Physics

High Energy Physics

High Energy Physics - Lattice

3 pages, latex, 2 postscript figures. Contribution to Lattice 94 proceedings

Scientific paper

10.1016/0920-5632(95)00293-I

The finite temperature transition or crossover in QCD with two degenerate Wilson quarks is investigated using a renormalization group improved action. At $\beta=2.0$ and 2.1 where $a^{-1} \sim 1.0-1.2$ GeV, the expectation value of the Polyakov loop and the pion screening mass on an $8^3 \times 4$ lattice vary smoothly with the hopping parameter through the transition/crossover. The quark screening mass in the high temperature phase agrees well with that in the low temperature phase calculated on an $8^4$ lattice. The smooth transition of the observables is totally different from the sharp transition found for the standard action at $\beta=5.0$ and 5.1 where $a^{-1}$ is also $1.0-1.2$ GeV.

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