Kavli Affiliate: Shunsaku Horiuchi
| First 5 Authors: Garv Chauhan, Shunsaku Horiuchi, Patrick Huber, Ian M. Shoemaker,
| Summary:
BSM electromagnetic properties of neutrinos may lead to copious production of
sterile neutrinos in the hot and dense core of a core-collapse supernova. In
this work, we focus on the active-sterile transition magnetic moment portal for
heavy sterile neutrinos. Firstly, we revisit the SN1987A cooling bounds for
dipole portal using the integrated luminosity method, which yields more
reliable results (especially in the trapping regime) compared to the previously
explored via emissivity loss, aka the Raffelt criterion. Secondly, we obtain
strong bounds on the dipole coupling strength reaching as low as $10^{-11}
text{ GeV}^{-1}$ from energy deposition, i.e., constrained from the
observation of explosion energies of underluminous Type IIP supernovae. In
addition, we find that sterile neutrino production from Primakoff upscattering
off of proton dominates over scattering off of electron for low sterile
neutrino masses.
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