TeV-scale bileptons, see-saw type II and lepton flavor violation in core-collapse supernova

Oleg Lychkovskiy, Sergei Blinnikov, Mikhail Vysotsky

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5 Citations (Scopus)

Abstract

Electrons and electron neutrinos in the inner core of the core-collapse supernova are highly degenerate and therefore numerous during a few seconds of explosion. In contrast, leptons of other flavors are non-degenerate and therefore relatively scarce. This is due to lepton flavor conservation. If this conservation law is broken by some non-standard interactions, νe are converted to νμ, ντ, and e are converted to μ. This affects the supernova dynamics and the supernova neutrino signal. We consider lepton flavor violating interactions mediated by scalar bileptons, i. e. heavy scalars with lepton number 2. It is shown that in case of TeV-mass bileptons the electron Fermi gas is equilibrated with non-electron species inside the inner supernova core at a time scale ~(1-100) ms. In particular, a scalar triplet which generates neutrino masses through the see-saw type II mechanism is considered. It is found that the supernova core is sensitive to yet unprobed values of masses and couplings of the triplet.

Original languageEnglish
Pages (from-to)213-227
Number of pages15
JournalEuropean Physical Journal C
Volume67
Issue number1
DOIs
Publication statusPublished - May 2010
Externally publishedYes

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