Enhanced Muonization by Active-Sterile Neutrino Mixing in Protoneutron Stars
Enhanced Muonization by Active-Sterile Neutrino Mixing in Protoneutron Stars
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Abstract
We study –
and
–
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
lepton number. We show that for our adopted mixing parameters
keV
and
consistent with the current constraints, sterile neutrino production is dominated by the Mikheyev
Smirnov
Wolfenstein conversion of
into
and that the subsequent escape of
increases the
lepton number, which in turn enhances muonization of the PNS primarily through
. We find that this enhancement is amplified by diffusion of the
and
lepton numbers. While these results are qualitatively robust, their quantitative effects on the dynamics and active neutrino emission of CCSNe should be evaluated by including
–
and
–
mixing in the simulations.