Effects of degenerate sterile neutrinos on the supernova neutrino flux

Abstract

We consider the possibility that there exist sterile neutrinos which are closely degenerate in mass with the active neutrinos and mixed with them. We investigate the effects of this kind of active-sterile neutrino mixing on the composition of supernova neutrino flux at the Earth. If an adiabatic MSW-transition between active and sterile neutrinos takes place, it could dramatically diminish the electron neutrino flux.Comment: 12 pages. Final version to be published in Phys. Lett.

Neutrino Emission and Mass Ejection in Quark Novae

“…For example, sterile neutrinos could, if created in conversion processes, carry away a significant amount of explosion energy and influence the dynamics of the QN. These kinds of neutrino models have been extensively studied in connection with supernovae, and it is found that sterile neutrinos with masses in the keV range may lead to conversions, but very heavy or light sterile neutrinos have no resonances inside the core or envelope (see, e.g., Abazajian et al 2001;Keränen et al 2004). We do not consider the possibility of sterile neutrinos further in this work.…”

Cosmology Favoring Extra Radiation and Sub-eV Mass Sterile Neutrinos as an Option

“…Low-mass sterile neutrinos mixed with active ones can strongly modify the neutrino signal from a core-collapse SN and r-process nucleosynthesis in the neutrino-driven wind [21,[45][46][47][48]. These effects should be studied in the presence of two sterile flavors and CP violating phases.…”

Cosmology seeking friendship with sterile neutrinos

“…Low-mass sterile neutrinos mixed with active ones can strongly modify the neutrino signal from a core-collapse SN and r-process nucleosynthesis in the neutrino-driven wind [21,[45][46][47][48]. These effects should be studied in the presence of two sterile flavors and CP violating phases.…”