scholarly journals Gluon screening mass at finite temperature from the Landau gauge gluon propagator in lattice QCD

2014 ◽  
Vol 89 (7) ◽  
Author(s):  
P. J. Silva ◽  
O. Oliveira ◽  
P. Bicudo ◽  
N. Cardoso
Keyword(s):  
Lattice Qcd ◽  
Finite Temperature ◽  
Gluon Propagator ◽  
Landau Gauge

scholarly journals LATTICE QCD GLUON PROPAGATORS NEAR TRANSITION TEMPERATURE

2012 ◽  
Vol 27 (09) ◽  
pp. 1250050 ◽  
Author(s):  
V. G. BORNYAKOV ◽  
V. K. MITRJUSHKIN
Keyword(s):  
Transition Temperature ◽  
Lattice Qcd ◽  
Finite Volume ◽  
Momentum Space ◽  
Transition Point ◽  
Gluon Propagator ◽  
Landau Gauge ◽  
Volume Dependence ◽  
Gauge Fixing ◽  
Two Phases

Landau gauge gluon propagators are studied numerically in the SU (3) gluodynamics as well as in the full QCD with the number of flavors nF = 2 using efficient gauge fixing technique. We compare these propagators at temperatures very close to the transition point in two phases: confinement and deconfinement. The electric mass mE has been determined from the momentum space longitudinal gluon propagator. Gribov copy effects are found to be rather strong in the gluodynamics, while in the full QCD case they are weak ("Gribov noise"). Also we analyze finite volume dependence of the transverse and longitudinal propagators.

scholarly journals Landau gauge gluon and ghost propagators from lattice QCD withNf=2twisted mass fermions at finite temperature

2013 ◽  
Vol 87 (11) ◽  
Author(s):  
R. Aouane ◽  
F. Burger ◽  
E.-M. Ilgenfritz ◽  
M. Müller-Preussker ◽  
A. Sternbeck
Keyword(s):  
Lattice Qcd ◽  
Finite Temperature ◽  
Landau Gauge

scholarly journals A STUDY OF GLUON PROPAGATOR ON COARSE LATTICE

2000 ◽  
Vol 15 (04) ◽  
pp. 229-244 ◽  
Author(s):  
J. P. MA
Keyword(s):  
Lattice Qcd ◽  
Smooth Function ◽  
Qualitative Agreement ◽  
Lattice Spacing ◽  
Continuum Limit ◽  
Gluon Propagator ◽  
Landau Gauge ◽  
Lattice Action ◽  
Lattice Volume ◽  
The Continuum

We study gluon propagator in Landau gauge with lattice QCD, where we use an improved lattice action. The calculation of gluon propagator is performed on lattices with the lattice spacing from 0.40 fm to 0.24 fm and with the lattice volume from (2.40 fm )4 to (4.0 fm )4. We find that the rotation invariance is approximately restored in the q2-range, indicated by the fact that the propagator is a smooth function of the continuum momentum q2. We try to fit our results by two different ways, in the first one we interpret the calculated gluon propagators as a function of the continuum momentum, while in the second we interpret the propagators as a function of the lattice momentum. In both cases we use models which are the same in continuum limit. A qualitative agreement between two fittings is found.

scholarly journals Two-point functions of quenched lattice QCD in Numerical Stochastic Perturbation Theory. (II) The gluon propagator in Landau gauge

2011 ◽  
Vol 842 (1) ◽  
pp. 122-139 ◽  
Author(s):  
F. Di Renzo ◽  
E.-M. Ilgenfritz ◽  
H. Perlt ◽  
A. Schiller ◽  
C. Torrero
Keyword(s):  
Perturbation Theory ◽  
Lattice Qcd ◽  
Gluon Propagator ◽  
Stochastic Perturbation ◽  
Landau Gauge

scholarly journals Finite temperature gluon propagator in Landau gauge: non-zero Matsubara frequencies and spectral densities

2018 ◽  
Vol 175 ◽  
pp. 07038 ◽  
Author(s):  
Paulo J. Silva ◽  
Orlando Oliveira ◽  
David Dudal ◽  
Martin Roelfs
Keyword(s):  
Spectral Density ◽  
Finite Temperature ◽  
Gluon Propagator ◽  
Landau Gauge ◽  
Discrepancy Principle ◽  
Spectral Densities ◽  
Tikhonov Regularisation ◽  
Morozov Discrepancy Principle ◽  
Lattice Computation

We report on the lattice computation of the Landau gauge gluon propagator at finite temperature, including the non-zero Matsubara frequencies. Moreover, the corresponding Källén-Lehmann spectral density is computed, using a Tikhonov regularisation together with the Morozov discrepancy principle. Implications for gluon confinement are also discussed.

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