期刊
PHYSICAL REVIEW D
卷 99, 期 7, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.99.076015
关键词
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资金
- Helmholtz Young Investigator Group from the Helmholtz Association [VH-NG-822]
- Helmholtz International Center for the Facility for Antiproton and Ion Research (HIC for FAIR) within the State of Hesse
- U.S. Department of Energy [DE-FG-88ER40388]
- Deutsche Forschungs-Gemeinschaft (DFG) [CRC-TR 211]
- Gesellschaft fur Schwerionenforschung (GSI)
Motivated by the theory of relativistic hydrodynamic fluctuations we make use of the Green-Kubo formula to compute the electrical conductivity and the (second-order) relaxation time of the electric current of an interacting hadron gas. We use the recently developed transport code SMASH to numerically solve the coupled set of Boltzmann equations implementing realistic hadronic interactions. In particular, we explore the role of the resonance lifetimes in the determination of the electrical relaxation time. As opposed to a previous calculation of the shear viscosity we observe that the presence of resonances with lifetimes of the order of the mean-free time does not appreciably affect the relaxation of the electric current fluctuations. We compare our results to other approaches describing similar systems, and provide the value of the electrical conductivity and the relaxation time for a hadron gas at temperatures between T = 60 MeV and T = 150 MeV.
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