SU2 lattice gluon propagators at finite temperatures in the deep infrared region and Gribov copy effects - High Energy Physics - LatticeReportar como inadecuado




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Abstract: We study numerically the SU2 Landau gauge transverse and longitudinal gluonpropagators at non-zero temperatures T both in confinement and deconfinementphases. The special attention is paid to the Gribov copy effects in theIR-region. Applying powerful gauge fixing algorithm we find that the Gribovcopy effects for the transverse propagator D Tp are very strong in theinfrared, while the longitudinal propagator D Lp shows very weak if anyGribov copy dependence. The value D T0 tends to decrease with growing latticesize; however, D T0 is non-zero in the infinite volume limit, in disagreementwith the suggestion made in 1. We show that in the infrared region D Tp isnot consistent with the pole-type formula not only in the deconfinement phasebut also for T < T c. We introduce new definition of the magnetic infrared massscale -magnetic screening mass- m M. The electric mass m E has beendetermined from the momentum space longitudinal gluon propagator. We study alsothe finite volume and temperature dependence of the propagators as well asdiscretization errors.



Autor: V. G. Bornyakov, V. K. Mitrjushkin

Fuente: https://arxiv.org/







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