Sterile neutrino signals from supernovae

Details Sterile neutrino signals from supernovae Sterile neutrino signals from supernovae

2007-08-24

arxiv.org/abs/0708.3337v2

Phys.Rev.D76:125026,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 3 figures. This is the corrected version to be published in Physical Review D

Scientific paper

10.1103/PhysRevD.76.125026

We investigate the effects of a mixing of active and sterile neutrinos on the ratios of supernova electron neutrino flux ($F_e$) and antineutrino flux ($F_{\bar e}$) to the total flux of the other neutrino and antineutrino flavours ($F_a$). We assume that the heaviest (in the normal hierarchy) Standard Model neutrino $\nu_3$ mixes with a sterile neutrino resulting in a pair of mass eigenstates with a small mass gap. Using the density matrix formalism we solve numerically the the evolution of neutrino states in the envelope of a supernova and determine the flux ratios $F_e/F_a$ and $F_{\bar{e}}/F_a$ as a function of the active-sterile mixing angle and for the experimentally allowed range of the standard active-active mixing angle $\theta_{13}$.

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