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Role of dense matter in collective supernova neutrino transformations

A. Esteban-Pretel A. Mirizzi S. Pastor R. Tomas 1 G. G. Raffelt P. D. Serpico G. Sigl 2
2 APC - THEORIE
APC (UMR_7164) - AstroParticule et Cosmologie, Institut für theoretische Physik
Abstract : For neutrinos streaming from a supernova (SN) core, dense matter suppresses self-induced flavor transformations if the electron density n_e significantly exceeds the neutrino density n_nu in the conversion region. If n_e is comparable to n_nu one finds multi-angle decoherence, whereas the standard self-induced transformation behavior requires that in the transformation region n_nu is safely above n_e. This condition need not be satisfied in the early phase after SN core bounce. Our new multi-angle effect is a subtle consequence of neutrinos traveling on different trajectories when streaming from a source that is not point-like.
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Submitted on : Tuesday, July 15, 2008 - 5:06:43 PM
Last modification on : Wednesday, September 23, 2020 - 4:36:49 AM

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A. Esteban-Pretel, A. Mirizzi, S. Pastor, R. Tomas, G. G. Raffelt, et al.. Role of dense matter in collective supernova neutrino transformations. Physical Review D, American Physical Society, 2008, 78, pp.085012. ⟨10.1103/PhysRevD.78.085012⟩. ⟨in2p3-00297293⟩

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