Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-05-05
Phys.Rev.D84:025002,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
Revised version (15 pages, 13 eps figures) published on Physical Review D. Discussion enlarged, references updated
Scientific paper
10.1103/PhysRevD.84.025002
The usual description of self-induced neutrino flavor conversions in core collapse supernovae (SNe) is based on the dominance of the neutrino density n_nu over the net electron density n_e. However, this condition is not met during the post-bounce accretion phase, when the dense matter in a SN is piled up above the neutrinosphere. As recently pointed-out, a dominant matter term in the anisotropic SN environment would dephase the flavor evolution for neutrinos traveling on different trajectories, challenging the occurrence of the collective behavior in the dense neutrino gas. Using the results from recent long term simulations of core-collapse SN explosions, based on three flavor Boltzmann neutrino transport in spherical symmetry, we find that both the situations of complete matter suppression (when n_e >> n_nu) and matter-induced decoherence (when n_e \gtrsim n_nu) of flavor conversions are realized during the accretion phase. The matter suppression at high densities prevents any possible impact of the neutrino oscillations on the neutrino heating and hence on the dynamics of the explosion. Furthermore, it changes the interpretation of the Earth matter effect on the SN neutrino signal during the accretion phase, allowing the possibility of the neutrino mass hierarchy discrimination at not too small values of the leptonic mixing angle \theta_{13} (i.e. \sin^2{\theta}_{13} \gtrsim 10^{-3}).
Chakraborty Sovan
Fischer Tobias
Mirizzi Alessandro
Saviano Ninetta
Tomas Ricard
No associations
LandOfFree
Analysis of matter suppression in collective neutrino oscillations during the supernova accretion phase does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Analysis of matter suppression in collective neutrino oscillations during the supernova accretion phase, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Analysis of matter suppression in collective neutrino oscillations during the supernova accretion phase will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-691236