  Spherically symmetric simulations of stellar core collapse and post-bounce
evolution are used to test the sensitivity of the supernova dynamics to
different variations of the input physics. We consider a state-of-the-art
description of the neutrino-nucleon interactions, possible lepton-number
changing neutrino reactions in the neutron star, and the potential impact of
hydrodynamic mixing behind the supernova shock.

Astrophysics