A comparative study on two different approaches of bulk viscosity in the Polyakov–Nambu–Jona-Lasinio model
2017 ◽
Vol 32
(05)
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pp. 1750018
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Keyword(s):
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.
Keyword(s):
2019 ◽
Vol 34
(31)
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pp. 1950199
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2012 ◽
Vol 21
(03)
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pp. 1250017
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1996 ◽
Vol 10
(22)
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pp. 2745-2756
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2010 ◽
Vol 19
(08n10)
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pp. 1549-1552
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2001 ◽
Vol 344
(1-2)
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pp. 107-112
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Keyword(s):
2015 ◽
Vol 30
(34)
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pp. 1550199
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