Neutrino magnetic moment portal and supernovae: New constraints and multimessenger opportunities
- Brdar, Vedran et al
- arXiv:2302.10965FERMILAB-PUB-23-063-TNUHEP-TH/23-01CERN-TH-2023-024USTC-ICTS/PCFT-23-06
 | 2$\sigma$ constraints and future sensitivity for the transition magnetic moment $d$ as a function of sterile neutrino mass $M_N$. |
 | Sterile neutrino decay geometry. |
 | Photons flux (at the Earth) from sterile neutrino decay, for $\Delta t <223$~s (solid) and $\Delta t <3600$~s (dashed). |
 | Diffuse photon flux from sterile neutrino decays compared to the extragalactic photon background measured by COMPTEL \cite{Strong:1994} (green) and EGRET \cite{Hunter:1997} (purple); for more data in this energy regime see \cite{Caputo:2021rux}. |
 | Thermal active neutrino spectrum (blue) relative to that of sterile neutrinos (red, green) produced through the magnetic moment portal. See text for details. |
 | Diffuse neutrino flux from sterile neutrino decays compared to the flux sensitivity of KamLAND and Super-Kamiokande. |