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Title: Relaxation time ansatz and shear and bulk viscosities of gluon matter

Abstract

Shear and bulk viscosity-to-entropy density ratios are calculated for pure gluon matter in a nonequilibrium mean-field quasiparticle approach within the relaxation time approximation. We study how different approximations used in the literature affect the results for the shear and bulk viscosities. Though the results for the shear viscosity turned out to be quite robust, all evaluations of the shear and bulk viscosities obtained in the framework of the relaxation time approximation can be considered only as rough estimations.

Authors:
 [1];  [2];  [1];  [3];  [4]
  1. Joint Institute for Nuclear Research, 141980 Dubna (Russian Federation)
  2. (Moldova, Republic of)
  3. National Research Nuclear University ''MEPhI,'' Kashirskoe sh. 31, Moscow 115409 (Russian Federation)
  4. (Germany)
Publication Date:
OSTI Identifier:
21596783
Resource Type:
Journal Article
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 84; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevC.84.035202; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; APPROXIMATIONS; ENTROPY; EVALUATION; GLUONS; MEAN-FIELD THEORY; RELAXATION TIME; SIMULATION; BOSONS; CALCULATION METHODS; PHYSICAL PROPERTIES; THERMODYNAMIC PROPERTIES

Citation Formats

Khvorostukhin, A. S., Institute of Applied Physics, Moldova Academy of Science, MD-2028 Kishineu, Toneev, V. D., Voskresensky, D. N., and GSI, Helmholtzzentrum fuer Schwerionenforschung GmbH, Planckstrasse 1, DE-64291 Darmstadt. Relaxation time ansatz and shear and bulk viscosities of gluon matter. United States: N. p., 2011. Web. doi:10.1103/PHYSREVC.84.035202.
Khvorostukhin, A. S., Institute of Applied Physics, Moldova Academy of Science, MD-2028 Kishineu, Toneev, V. D., Voskresensky, D. N., & GSI, Helmholtzzentrum fuer Schwerionenforschung GmbH, Planckstrasse 1, DE-64291 Darmstadt. Relaxation time ansatz and shear and bulk viscosities of gluon matter. United States. doi:10.1103/PHYSREVC.84.035202.
Khvorostukhin, A. S., Institute of Applied Physics, Moldova Academy of Science, MD-2028 Kishineu, Toneev, V. D., Voskresensky, D. N., and GSI, Helmholtzzentrum fuer Schwerionenforschung GmbH, Planckstrasse 1, DE-64291 Darmstadt. Thu . "Relaxation time ansatz and shear and bulk viscosities of gluon matter". United States. doi:10.1103/PHYSREVC.84.035202.
@article{osti_21596783,
title = {Relaxation time ansatz and shear and bulk viscosities of gluon matter},
author = {Khvorostukhin, A. S. and Institute of Applied Physics, Moldova Academy of Science, MD-2028 Kishineu and Toneev, V. D. and Voskresensky, D. N. and GSI, Helmholtzzentrum fuer Schwerionenforschung GmbH, Planckstrasse 1, DE-64291 Darmstadt},
abstractNote = {Shear and bulk viscosity-to-entropy density ratios are calculated for pure gluon matter in a nonequilibrium mean-field quasiparticle approach within the relaxation time approximation. We study how different approximations used in the literature affect the results for the shear and bulk viscosities. Though the results for the shear viscosity turned out to be quite robust, all evaluations of the shear and bulk viscosities obtained in the framework of the relaxation time approximation can be considered only as rough estimations.},
doi = {10.1103/PHYSREVC.84.035202},
journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 3,
volume = 84,
place = {United States},
year = {2011},
month = {9}
}