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Effects of dense quark matter on gluon propagators in lattice QC2D

V. G. Bornyakov, V. V. Braguta, Aleksandr Nikolaev Orcid Logo, R. N. Rogalyov

Physical Review D, Volume: 102, Issue: 11

Swansea University Author: Aleksandr Nikolaev Orcid Logo

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DOI (Published version): 10.1103/physrevd.102.114511

Abstract

The transverse and longitudinal gluon propagators in the Landau gauge are studied in the two-color lattice QCD at nonzero quark chemical potential μq. Parametrization of the momentum dependence of the propagators is provided for all values of chemical potential under study. We find that the longitud...

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Published in: Physical Review D
ISSN: 2470-0010 2470-0029
Published: American Physical Society (APS) 2020
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URI: https://cronfa.swan.ac.uk/Record/cronfa57545
Abstract: The transverse and longitudinal gluon propagators in the Landau gauge are studied in the two-color lattice QCD at nonzero quark chemical potential μq. Parametrization of the momentum dependence of the propagators is provided for all values of chemical potential under study. We find that the longitudinal propagator is infrared suppressed at nonzero μq with suppression increasing with increasing μq. The transverse propagator dependence on μq was found to be opposite: it is enhanced at large μq. It is found, respectively, that the electric screening mass is increasing while the magnetic screening mass is decreasing with increasing μq. Nice agreement between the electric screening mass computed from the longitudinal propagator and the Debye mass computed earlier from the singlet static quark-antiquark potential was found. We discuss how the dependence of the propagators on the chemical potential correlates with the respective dependence of the string tension. Additionally, we consider the difference between two propagators as a function of the momentum and make interesting observations.
College: Faculty of Science and Engineering
Funders: The work was completed due to support of the Russian Foundation for Basic Research via Grant No. 18-02-40130 mega. V. V. B. acknowledges the support from the BASIS foundation. A. A. N. acknowledges the support from STFC via Grant No. ST/P00055X/1.
Issue: 11

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