Shear viscosity and electric conductivity of a hot and dense QGP with a chiral phase transition
| Autor: | David Fuseau, Olga Soloveva, Jörg Aichelin, Elena Bratkovskaya |
|---|---|
| Přispěvatelé: | Laboratoire de physique subatomique et des technologies associées (SUBATECH), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Quark
Phase transition deconfinement quark: interaction conductivity: electric Nuclear Theory [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th] High Energy Physics::Lattice FOS: Physical sciences Relativistic Nuclear Collisions Transition rate matrix 01 natural sciences 7. Clean energy Nuclear Theory (nucl-th) Boltzmann equation Jona-Lasinio-Nambu model: Polyakov loop High Energy Physics - Phenomenology (hep-ph) 0103 physical sciences quantum chromodynamics Nuclear Experiment 010306 general physics temperature dependence quark gluon: plasma Physics Quantum chromodynamics quark: matter density Condensed matter physics 010308 nuclear & particles physics Relaxation (NMR) High Energy Physics::Phenomenology Baryon baryon High Energy Physics - Phenomenology Strange matter potential: chemical [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph] viscosity High Energy Physics::Experiment entropy critical phenomena: chiral |
| Zdroj: | Physical Review C Physical Review C, American Physical Society, 2021, 103 (5), pp.054901. ⟨10.1103/PhysRevC.103.054901⟩ |
| ISSN: | 2469-9985 2469-9993 |
| DOI: | 10.1103/PhysRevC.103.054901⟩ |
| Popis: | We calculate two transport coefficients -- the shear viscosity over entropy ratio $\eta/s$ and the ratio of the electric conductivity to the temperature $\sigma_0/T$ -- of strongly interacting quark matter within the extended $N_f=3$ Polyakov Nambu-Jona-Lasinio (PNJL) model along the crossover transition line for moderate values of baryon chemical potential $0 \leq \mu_B \leq 0.9$ GeV as well as in the vicinity of the critical endpoint (CEP) and at large baryon chemical potential $\mu_B=1.2$ GeV, where the first-order phase transition takes place. The evaluation of the transport coefficients is performed on the basis of the effective Boltzmann equation in the relaxation time approximation. We employ two different methods for the calculation of the quark relaxation times: i) using the averaged transition rate defined via thermal averaged quark-quark and quark-antiquark PNJL cross sections and ii) using the 'weighted' thermal averaged quark-quark and quark-antiquark PNJL cross sections. The $\eta/s$ and $\sigma_0/T$ transport coefficients have a similar temperature and chemical potential behavior when approaching the chiral phase transition for the both methods for the quark relaxation time, however, the differences grow with increasing temperature. We demonstrate the effect of the first-order phase transition and of the CEP on the transport coefficients in the deconfined QCD medium. Comment: 16 pages, 21 figures, 4 tables |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|