Response function and chiral effective field theory in dense nuclear matter to obtain neutrino absorption crosssection

Neutrino absorption and scattering crosssections in supernovae and neutron star mergers are essential for understanding the dynamical evolution of these high-energy astrophysical events and the associated nucleosynthesis outcomes. We considered the medium modifications such as mean-field correction, vertex correction, and Random Phase Approximation(RPA), which significantly modified the mean free path neutrino for free gas. The density and spin response functions have been calculated with nuclear matter interaction derived from chiral effective field theory(ChEFT).