Enhanced Muonization by Active-Sterile Neutrino Mixing in Protoneutron Stars

Abstract

We study ${\nu }_{\mu }$-${\nu }_s$ and ${\bar{\nu }}_{\mu }$-${\bar{\nu }}_s$ mixing in the protoneutron star (PNS) created in a core-collapse supernova (CCSN). We point out the importance of the feedback on the general composition of the PNS in addition to the obvious feedback on the ${\nu }_{\mu }$ lepton number. We show that for our adopted mixing parameters $\delta m^2\sim 10^2$~keV${}^2$ and ${\sin }^{2}2\theta$ consistent with the current constraints, sterile neutrino production is dominated by the Mikheyev-Smirnov-Wolfenstein conversion of ${\bar{\nu }}_{\mu }$ into ${\bar{\nu }}_s$ and that the subsequent escape of ${\bar{\nu }}_s$ increases the ${\nu }_{\mu }$ lepton number, which in turn enhances muonization of the PNS primarily through ${\nu }_{\mu }+n\to p+{\mu }^{-}$. While these results are qualitatively robust, their quantitative effects on the dynamics and active neutrino emission of CCSNe should be evaluated by including ${\nu }_{\mu }$-${\nu }_s$ and ${\bar{\nu }}_{\mu }$-${\bar{\nu }}_s$ mixing in the simulations.

v2: 11 pages, 7 figures. Minor clarifications added, conclusion unchanged. Matches version published in PRD

References in corpus (15)

• A lower bound on the mass of Dark Matter particles
• Sterile Neutrinos
• Muon Creation in Supernova Matter Facilitates Neutrino-driven Explosions
• New Constraints on Sterile Neutrino Dark Matter from $NuSTAR$ M31 Observations
• Constraining DM properties with SPI
• Long-Exposure NuSTAR Constraints on Decaying Dark Matter in the Galactic Halo
• Supernova bound on keV-mass sterile neutrinos reexamined
• Dark matter sterile neutrinos in stellar collapse: alteration of energy/lepton number transport and a mechanism for supernova explosion enhancement
• Sterile Neutrino-Enhanced Supernova Explosions
• Neutrinos and nucleosynthesis of elements
• Constraints on sterile neutrino models from strong gravitational lensing, Milky Way satellites, and Lyman-$\alpha$ forest
• Sterile neutrino oscillations in core-collapse supernovae
• Comprehensive constraints on heavy sterile neutrinos from core-collapse supernovae
• Evolution of Tau-Neutrino Lepton Number in Protoneutron Stars due to Active-Sterile Neutrino Mixing
• Probing self-interacting sterile neutrino dark matter with the diffuse supernova neutrino background

Cited by in corpus (2)

• Gravitational-Wave Signatures of Nonstandard Neutrino Properties in Collapsing Stellar Cores
• Opening up New Parameter Space for Sterile Neutrino Dark Matter