Neutrino Transport in Type II Supernovae: Boltzmann Solver vs Monte Carlo Method

In this paper we discuss the results of extensive comparison of the Boltz-mann solver recently developed by us and the Monte Carlo method coded by Janka. The aim of our project is to improve the treatment of the neutrino transfer and to study the neutrino reactions systematically, since the numerical treatment of neutrino transfer and neutrino reaction rates in the hot dense medium are two of the greatest uncertainties in the supernova simulations.