Abstract
Neutrinos in a core-collapse supernova can undergo fast flavor conversions with a possible impact on the explosion mechanism and nucleosynthesis. We perform the first nonlinear simulations of fast conversions in the presence of three neutrino flavors. The recent supernova simulations with muon production call for such an analysis, as they relax the standard ν_{μ,τ}=ν[over ¯]_{μ,τ} (two-flavor) assumption. Our results show the significance of muon and tau lepton number angular distributions, together with the traditional electron lepton number ones. Indeed, our three-flavor results are potentially very different from two-flavor ones. These results strengthen the need to further investigate the occurrence of fast conversions in supernova simulation data, including the degeneracy breaking of mu and tau neutrinos.
Highlights
Introduction.—Neutrinos streaming out of a supernova (SN) encounter a large density of ambient neutrinos and antineutrinos
Our results show the significance of muon and tau lepton number angular distributions, together with the traditional electron lepton number ones
A host of studies [5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20] in the past few years suggest that a necessary though not sufficient condition for the existence of these fast instabilities is the presence of a zero crossing in the angular distribution of the neutrino electron lepton number (ELN), i.e., the difference between the electron neutrino and the antineutrino angular emission spectra should go through a zero for some emission angle
Summary
Introduction.—Neutrinos streaming out of a supernova (SN) encounter a large density of ambient neutrinos and antineutrinos. We perform the first nonlinear simulations of fast conversions in the presence of three neutrino flavors. These fast flavor conversions (FFC) can occur close to the region of neutrino free-streaming, and can grow as large as 105 times faster than the vacuum oscillations.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
