The Quark propagator at finite temperature

Boyd, G.; Karsch, F.; Gupta, S.

doi:10.1016/0550-3213(92)90055-G

The Quark propagator at finite temperature

1992

21 pages

Published in:

Nucl.Phys.B 385 (1992) 481-501

Published: 1992

DOI:

10.1016/0550-3213(92)90055-G

View in:

CERN Document Server

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Abstract: (Elsevier)

We study the quark propagator at finite temperature on euclidean lattices in the Landau gauge, and compare the results to an O( g 2 ) lattice weak coupling calculation. The screening mass obtained from spatial correlation functions in the chiral symmetric phase is close to the Matsubara frequency. The temporal correlation functions yield a much smaller screening mass, which approaches the perturbative result, m eff 2 = g 2 T 2 /6, for T ≳1.75 T c . Deviations from the perturbative behaviour are seen for T c ⩽ T ⩽1.75 T c . For T ⩽ T c , the screening masses from both spatial and temporal correlation functions are large and close to half the mass of the ϱ-meson. Dispersion relations do not show any significant deviations from free particle behaviour.

quark: propagator
finite temperature
lattice field theory: Euclidean
Landau gauge
mass: screening
screening: mass
correlation function
critical phenomena
dispersion relation
gauge field theory: SU(3)

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