Neutrinos self interactions in Supernovae

Abstract

Oscillations of neutrino emerging from a supernova core are studied. In this extremely high density region neutrino self interactions induce collective flavor transitions. When collective transitions are decoupled from matter oscillations, as for our chosen matter profile, an analytical interpretation of the collective effects is possible, by means of a mechanical analogy with a spherical pendulum. For inverted neutrino hierarchy the neutrino propagation can be divided in three regimes: synchronization, bipolar oscillations, and spectral split. Our simulation shows that averaging over neutrino trajectories does not alter the nature of these three regimes.

6 pages, 7 figures, to appear in the Proceedings of the 43rd Rencontres de Moriond EW session, La Thuile, Italy, 1-8 March 2008

References in corpus (7)

• Simulation of Coherent Non-Linear Neutrino Flavor Transformation in the Supernova Environment I: Correlated Neutrino Trajectories
• Self-induced conversion in dense neutrino gases: Pendulum in flavour space
• Collective neutrino flavor transitions in supernovae and the role of trajectory averaging
• Self-induced spectral splits in supernova neutrino fluxes
• Physics of Synchronized Neutrino Oscillations Caused by Self-Interactions
• Analysis of Collective Neutrino Flavor Transformation in Supernovae
• Identifying neutrino mass hierarchy at extremely small theta(13) through Earth matter effects in a supernova signal