title: Suppression of self-induced flavor conversion in the supernova accretion phase.
abstract: Self-induced flavor conversions of supernova (SN) neutrinos can strongly modify the flavor-dependent fluxes. We perform a linearized flavor stability analysis with accretion-phase matter profiles of a 15M[symbol: see text] spherically symmetric model and corresponding neutrino fluxes. We use realistic energy and angle distributions, the latter deviating strongly from quasi-isotropic emission, thus accounting for both multiangle and multienergy effects. For our matter and neutrino density profile we always find stable conditions: flavor conversions are limited to the usual Mikheyev-Smirnov-Wolfenstein effect. In this case one may distinguish the neutrino mass hierarchy in a SN neutrino signal if the mixing angle θ13 is as large as suggested by recent experiments.
authors.affiliation: Dipartimento di Scienze Fisiche, Università di Napoli Federico II, 80126 Napoli, Italy.
authors.forename: Srdjan
authors.initials: S
authors.lastname: Sarikas
authors.forename: Georg G
authors.initials: GG
authors.lastname: Raffelt
authors.forename: Lorenz
authors.initials: L
authors.lastname: Hüdepohl
authors.forename: Hans-Thomas
authors.initials: HT
authors.lastname: Janka