Open AccessExploring the partonic phase at finite chemical potential within a covariant off-shell transport approach
Author(s) -
E. Soloveva,
P. Moreau,
Lucia Oliva,
Taesoo Song,
Elena Bratkovskaya,
W. Cassing
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1667/1/012040
Subject(s) - physics , hadron , observable , particle physics , thermodynamics , quantum mechanics
We report on the extended Parton-Hadron-String Dynamics (PHSD) transport approach in the partonic sector by explicitly calculating the total and differential partonic scattering cross sections as a function of temperature T and baryon chemical potential μ औ on the basis of the effective propagators and couplings from the Dynamical QuasiParticle Model (DQPM). We calculated the ratio of shear viscosity η over entropy density s, i.e. η/s is evaluated using the collisional widths and compared to lQCD calculations for μ B = 0 as well. We find that the ratio η/s does not differ very much from that calculated within the original DQPM on the basis of the Kubo formalism. Furthermore, there is only a very modest change of η/s with the baryon chemical μ B as a function of the scaled temperature T /T C (μ B ). This also holds for a variety of hadronic observables from central A+A collisions in the energy range 5 GeV ≤ s N N ≤ 200 GeV when implementing the differential cross sections into the PHSD approach. Accordingly, it will be difficult to extract finite μ B -signals from the partonic dynamics based on bulk observables.