Supernova as particle-physics laboratory

The neutrino signal of supernova (SN) 1987A has provided numerous particle-physics constraints, primarily by the signal duration that precludes excessive energy losses in new channels. Improving these results with the neutrino signal from the next galactic SN requires a better understanding of the expected standard signal duration and in particular of neutrino opacities. Independently of neutrino observations, one should perform SN simulations including nonstandard flavor changing and lepton-number violating processes to understand their impact on SN dynamics