Suppression of fast neutrino flavor conversions occurring at large distances in core-collapse supernovae

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dc.contributor.authorAbbar, Sajaden
dc.contributor.authorCapozzi, Francescoen
dc.date.accessioned2022-07-18T13:51:25Zen
dc.date.available2022-07-18T13:51:25Zen
dc.date.issued2022-03en
dc.description.abstractNeutrinos propagating in dense neutrino media such as core-collapse supernovae and neutron star merger remnants can experience the so-called fast flavor conversions on scales much shorter than those expected in vacuum. A very generic class of fast flavor instabilities is the ones which are produced by the backward scattering of neutrinos off the nuclei at relatively large distances from the supernova core. In this study we demonstrate that despite their ubiquity, such fast instabilities are unlikely to cause significant flavor conversions if the population of neutrinos in the backward direction is not large enough. Indeed, the scattering-induced instabilities can mostly impact the neutrinos traveling in the backward direction, which represent only a small fraction of neutrinos at large radii. We show that this can be explained by the shape of the unstable flavor eigenstates, which can be extremely peaked at the backward angles.en
dc.description.notesWe are grateful to Georg Raffelt for helpful discussions and his comments on the manuscript. SA acknowledges support by the Deutsche Forschungsgemeinschaft through Sonderforschungbereich SFB 1258 Neutrinos and Dark Matter in Astro- and Particle Physics (NDM). The work of FC at Virginia Tech is supported by the U.S. Department of Energy under the award number DE-SC0020250. The work of FC at IFIC is supported by GVA Grant No. CDEIGENT/2020/003.en
dc.description.sponsorshipDeutsche Forschungsgemeinschaft through Sonderforschungbereich SFB 1258 Neutrinos and Dark Matter in Astro- and Particle Physics; U.S. Department of Energy [DE-SC0020250]; GVA [CDEIGENT/2020/003]en
dc.description.versionPublished versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1088/1475-7516/2022/03/051en
dc.identifier.issn1475-7516en
dc.identifier.issue3en
dc.identifier.other51en
dc.identifier.urihttp://hdl.handle.net/10919/111272en
dc.language.isoenen
dc.publisherIOP Publishingen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectsupernova neutrinosen
dc.subjectcore-collapse supernovaeen
dc.subjectneutrino astronomyen
dc.subjectsupernovasen
dc.titleSuppression of fast neutrino flavor conversions occurring at large distances in core-collapse supernovaeen
dc.title.serialJournal of Cosmology and Astroparticle Physicsen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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