A comparative study on two different approaches of bulk viscosity in the Polyakov–Nambu–Jona-Lasinio model
| Autor: | Sabyasachi Ghosh, Sudipa Upadhaya, Kinkar Saha |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
Quark Nuclear and High Energy Physics Particle physics 010308 nuclear & particles physics High Energy Physics::Lattice High Energy Physics::Phenomenology General Physics and Astronomy Astronomy and Astrophysics Volume viscosity 01 natural sciences Strange matter Entropy density 0103 physical sciences 010306 general physics Equivalence (measure theory) Mathematical physics |
| Zdroj: | Modern Physics Letters A. 32:1750018 |
| ISSN: | 1793-6632 0217-7323 |
| DOI: | 10.1142/s0217732317500183 |
| Popis: | We have gone through a comparative study on two different kinds of bulk viscosity expressions by using a common dynamical model. The Polyakov–Nambu–Jona-Lasinio (PNJL) model in the realm of mean-field approximation, including up to eight quark interactions for 2+1 flavor quark matter, is treated for this common dynamics. We have probed the numerical equivalence as well as discrepancy of two different expressions for bulk viscosity at vanishing quark chemical potential. Our estimation of bulk viscosity to entropy density ratio follows a decreasing trend with temperature, which is observed in most of the earlier investigations. We have also extended our estimation for finite values of quark chemical potential. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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