Enhanced muonization by active-sterile neutrino mixing in protoneutron stars

Journal Article · Fri Aug 02 04:00:00 EDT 2024 · Physical Review. D.

DOI:https://doi.org/10.1103/PhysRevD.110.043007· OSTI ID:2473473

Ray, Anupam; Qian, Yong-Zhong

We study ${\nu }_{\mu }\text{−}{\nu }_s$ and ${\overline{\nu }}_{\mu }\text{−}{\overline{\nu }}_s$ 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 $\delta m^2\sim {10}^2{\mathrm{keV}}^2$ and ${\sin }^{2}2\theta$ consistent with the current constraints, sterile neutrino production is dominated by the Mikheyev–Smirnov–Wolfenstein conversion of ${\overline{\nu }}_{\mu }$ into ${\overline{\nu }}_s$ and that the subsequent escape of ${\overline{\nu }}_s$ 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 core-collapse supernovae should be evaluated by including ${\nu }_{\mu }\text{−}{\nu }_s$ and ${\overline{\nu }}_{\mu }\text{−}{\overline{\nu }}_s$ mixing in the simulations.

Published by the American Physical Society 2024

• Sponsoring Organization: USDOE
• Grant/Contract Number: FG02-87ER40328
• OSTI ID: 2473473
• Alternate ID(s): OSTI ID: 2579535
• Journal Information: Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 4 Vol. 110; ISSN PRVDAQ; ISSN 2470-0010
• Publisher: American Physical Society
• Country of Publication: United States
• Language: English