Calculation of the baryon diffusion constant in hot and dense hadronic matter based on an ultrarelativistic collision event generator

Abstract

We evaluate thermodynamical quantities and transport coefficients of a dense and hot hadronic matter based on an event generator URASiMA (Ultra-Relativistic AA collision Simulator based on Multiple Scattering Algorithm). The statistical ensembles in equilibrium with fixed temperature and chemical potential are generated by imposing periodic boundary condition to the simulation of URASiMA, where energy density and baryon number density is conserved. Achievement of the thermal equilibrium and the chemical equilibrium are confirmed by the common value of slope parameter in the energy distributions and the saturation of the numbers of contained particles, respectively. By using the generated ensembles, we investigate the temperature dependence and the chemical potential dependence of the baryon diffusion constant of a dense and hot hadronic matter. : 13.75.-n, 25.75, 33.15.V, 28.20.G PACS

Generalized entropy and transport coefficients of hadronic matter

“…Thus, we need to investigate the transport properties of a hadron gas by using a microscopic model that includes realistic interactions among hadrons. This is of great interest in relativistic nuclear collision [14,15]. In this work, we adopt a relativistic microscopic model, ] Fig.…”

A calculation of the transport coefficients of hot and dense hadronic matter based on the event generator URASiMA

“…Once we establish phenomenological equations for the high temperature and high density hadronic matter, we can evaluate the appropriate transport coefficients in the same manner. Detailed discussion will be reported in our forthcoming paper [13].…”

“…For the full-relativistic description of the space-time evolution of a hot and dense matter, we need to establish relativistic Navier-Stokes equation [12]. Taking correlation of appropriate currents, we can easily evaluate viscosities and heat conductivity in the same manner [13] .…”

Decay of baryon inhomogeneities in an expanding universe

“…The diffusion equation has been studied in the early universe for the case of baryon diffusion in the hadronic phase [22][23][24] when the baryon number is carried by the neutrons and the protons. Here, for the first time, we use it to study, baryon diffusion in the quark gluon plasma phase.…”