Contributions of stochastic background fields to the shear and bulk viscosities of the gluon plasma |
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Authors: | Dmitri Antonov |
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Affiliation: | Departamento de Física and Centro de Física das Interacções Fundamentais, Instituto Superior Técnico, UT Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal |
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Abstract: | The contributions of confining as well as nonconfining nonperturbative self-interactions of stochastic background fields to the shear and bulk viscosities of the gluon plasma in SU(3) Yang-Mills theory are calculated. The nonconfining self-interactions change (specifically, diminish) the values of the shear and bulk viscosities by 15%, that is close to the 17% which the strength of the nonconfining self-interaction amounts to the full strength of nonperturbative self-interactions. The ratios to the entropy density of the obtained nonperturbative contributions to the shear and bulk viscosities are compared with the results of perturbation theory and the predictions of N = 4 SYM. |
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