Possible CP-violation effects in core-collapse supernovae

Abstract

10 pages, 16 figuresInternational audienceWe study CP-violation effects when neutrinos are present in dense matter, such as outside the proto-neutron star formed in a core-collapse supernova. General arguments based on the Standard Model predict that there are no CP-violating effects at the tree level in core-collapse supernovae, justifying the assumption of ignoring the Dirac delta phase made in most of the literature. Physics beyond the Standard Model, especially flavor-changing interactions might induce CP-violating effects. We analyze this possibility