Speaker
Description
Bulk matter produced in heavy ion collisions has multiple
conserved quantum numbers like baryon number, strangeness and electric charge. The diffusion process
of these charges can be described by a diffusion matrix describing the interdependence of diffusion of
different charges. The diffusion coefficient matrix is estimated here from the Boltzmann kinetic theory
for the hadronic phase within relaxation time approximation. In the derivation for the same,we impose the Landau-Lifshitz
conditions of fit. This leads to e.g. the diagonal diffusion coefficients
to be manifestly positive definite. The explicit calculations are performed
within the ambit of hadron resonance gas model with and without excluded volume corrections. It is seen that the off-diagonal
components can be significant to affect the charge diffusion in a fluid with
multiple conserved charges.The excluded volume correction effects is seen to be not significant in the estimation of the
elements of the diffusion matrix.
