Quark susceptibilities in a generalized quasiparticle model

The QCD equation of state as predicted by lattice QCD calculations (lQCD) is well reproduced in terms of effective quasiparticle models. These models so far fail to describe the susceptibilties and underestimate the pressure at finite densities. We present a generalised quasiparticle model where the...

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Bibliographic Details
Published in:Journal of physics. Conference series 2018-05, Vol.1024 (1), p.12029
Main Authors: Steinert, T., Cassing, W.
Format: Article
Language:English
Subjects:
Baryons
Chemical potential
Electrical resistivity
Elementary excitations
Equations of state
Physics
Quantum chromodynamics
Transport properties
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Summary:The QCD equation of state as predicted by lattice QCD calculations (lQCD) is well reproduced in terms of effective quasiparticle models. These models so far fail to describe the susceptibilties and underestimate the pressure at finite densities. We present a generalised quasiparticle model where the partonic propagators explicitly depend on the three-momentum with respect to the medium. Within this extended model we reproduce simultaneously the equation of state and the susceptibilties as provided by lQCD. We calculate the shear and bulk viscosity as well as the electric conductivity and compare to default quasiparticle models. We find a good agreement between our model and available lattice data for all transport coefficients. We use thermodynamic consistency to extend the model to finite baryon chemical potential and present predictions for the equation of state at finite baryon densities.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1024/1/012029