Bulk neutrinos and core cooling in Supernovae

por Giacomo Cacciapaglia (Scuola Normale Superiore di Pisa)

viernes 22 nov. 2002 12:00 → 13:00 Europe/Madrid

Sala de Juntas del IFIC (Edf. Institutos de Investigación)

In a recent paper we discuss the phenomenology of neutrino mixing with bulk fermions in the context of supernova physics. Following the usual energy loss argument, the core cooling strongly constraints the size of such extra dimensions and the mixing parameters. We show that these constraints can be widely relaxed due to a feedback mechanism that self-limits the loss. This mechanism also affects the protoneutron star evolution through a non trivial interplay with neutrino diffusion. Finally, we discuss the consistency with the SN1987A signal and possible effects on the neutrino flux composition and the delayed explosion scenario.