Bulk viscosity of hot dense Quark matter in the PNJL model |
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| Institution: | [1]Department of Computer Science , Central China Normal University, Wuhan 430079, China [2]Institute of Particle Physics, Central China Normal University, Wuhan 430079, China |
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| Abstract: | Starting from the Kubo formula and the QCD low energy theorem,we study the the bulk viscosity of hot dense quark matter in the PNJL model from the equation of state.We show that the bulk viscosity has a sharp peak near the chiral phase transition,and that the ratio of bulk viscosity over entropy rises dramatically in the vicinity of the phase transition.These results agree with those from the lattice and other model calculations.In addition,we show that the increase of chemical potential raises the bulk viscosity. |
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| Keywords: | bulk viscosity Kubo formula PNJL model |
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