Nucleon matter equation of state, particle number fluctuations, and shear viscosity within UrQMD box calculations

Abstract

Properties of equilibrated nucleon system are studied within the Ultra-relativistic Quantum Molecular Dynamics (UrQMD) transport model. The UrQMD calculations are done within a finite box with periodic boundary conditions. The system achieves thermal equilibrium due to nucleon-nucleon elastic scattering. For the UrQMD equilibrium state, nucleon energy spectra, equation of state, particle number fluctuations, and shear viscosity $\eta$ are calculated. The UrQMD results are compared with both, statistical mechanics and Chapman-Enskog kinetic theory, for a classical system of nucleons with hard-core repulsion.

19 pages, 8 figures, version accepted for publication in Journal of Physics G

References in corpus (6)

• Understanding transport simulations of heavy-ion collisions at 100 and 400 AMeV: Comparison of heavy ion transport codes under controlled conditions
• Examination of directed flow as a signature of the softest point of the equation of state in QCD matter
• Equation of state dependence of directed flow in a microscopic transport model
• Particle number fluctuations in nuclear collisions within excluded volume hadron gas model
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• Viscosity of a classical gas: The rare-collision versus the frequent-collision regime

Cited by in corpus (2)

• Shear viscosity in microscopic calculations of A+A collisions at energies of Nuclotron-based Ion Collider fAcility (NICA)
• Shear viscosity of nuclear matter in the spinodal region