Sterile neutrino signals from supernovae

Abstract

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 ${\theta }_{13}$.

arXiv comment5 pages, 3 figures. This is the corrected version to be published in Physical Review D

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Cited by in corpus (6)

• Impact of eV-mass sterile neutrinos on neutrino-driven supernova outflows
• Supernova Constraints on Massive (Pseudo)Scalar Coupling to Neutrinos
• nu_e Disappearance in MiniBooNE
• Flavor ratios of astrophysical neutrinos interacting with stochastic gravitational waves having arbitrary spectra
• CP-phase effects on the effective neutrino mass $m_{ee}$ in the case of quasi-degenerate neutrinos
• Learning more about what can be concluded from the observation of neutrinos from a galactic supernova