Improved actions for QCD thermodynamics on the lattice

Beinlich, B.; Karsch, F.; Laermann, E.

doi:10.1016/0550-3213(95)00681-8

Improved actions for QCD thermodynamics on the lattice

B. Beinlich
(
- Bielefeld U.
)
,
F. Karsch
(
- Bielefeld U. and
- CERN
)
,
E. Laermann
(
- Bielefeld U.
)

Oct, 1995

21 pages

Published in:

Nucl.Phys.B 462 (1996) 415-436

e-Print:

hep-lat/9510031 [hep-lat]

DOI:

10.1016/0550-3213(95)00681-8

Report number:

CERN-TH-95-253,
BI-TP-95-33

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Abstract:

Finite cut-off effects strongly influence the thermodynamics of lattice regularized QCD at high temperature in the standard Wilson formulation. We analyze the reduction of finite cut-off effects in formulations of the thermodynamics of

SU(N)

gauge theories with three different

O(a~2)

and

O(a~4)

improved actions. We calculate the energy density and pressure on finite lattices in leading order weak coupling perturbation theory (

T\rightarrow \infty

) and perform Monte Carlo simulations with improved

SU(3)

actions at non-zero

g~2

. Already on lattices with temporal extent

N_\tau=4

we find a strong reduction of finite cut-off effects in the high temperature limit, which persists also down to temperatures a few times the deconfinement transition temperature.

Note:

20 pages, 3 Postscript figures Report-no: BI-TP 95/33, CERN-TH/95-253

11.15.Ha
11.10.Wx
12.38.Gc
lattice field theory
improved actions
QCD thermodynamics
SU(3)
critical phenomena
Monte Carlo calculations
lattice field theory: action

References(22)

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