Neutrino mass spectrum from gravitational waves generated by double neutrino spin-flip in supernovae
Sep, 2008Citations per year
Abstract: (arXiv)
The supernova (SN) neutronization phase produces mainly electron () neutrinos, the oscillations of which must take place within a few mean-free-paths of their resonance surface located nearby their neutrinosphere. The state-of-the-art on the SN dynamics suggests that a significant part of these can convert into right-handed neutrinos in virtue of the interaction of the electrons and the protons flowing with the SN outgoing plasma, whenever the Dirac neutrino magnetic moment be of strength , with being the Bohr magneton. In the supernova envelope, part of these neutrinos can flip back to the left-handed flavors due to the interaction of the neutrino magnetic moment with the magnetic field in the SN expanding plasma (Kuznetsov & Mikheev 2007/ Kuznetsov, Mikheev & Okrugin 2008), a region where the field strength is currently accepted to be ~G. This type of oscillations were shown to generate powerful gravitational wave (GW) bursts (Mosquera Cuesta 2000, Mosquera Cuesta 2002, Mosquera Cuesta & Fiuza 2004, Loveridge 2004). If such double spin-flip mechanism does run into action inside the SN core, then the release of both the oscillation-produced s, s and the GW pulse generated by the coherent spin-flips provides a unique emission offset for measuring the travel time to Earth. As massive s get noticeably delayed on its journey to Earth with respect to the Einstein GW they generated during the reconversion transient, then the accurate measurement of this time-of-flight delay by SNEWS + LIGO, VIRGO, BBO, DECIGO, etc., might readily assess the absolute mass spectrum.- gravitational waves
- elementary particles
- neutrinos
- stars: magnetic fields
- (stars:) supernovae: general
- methods: data analysis
- neutrino: magnetic moment
- neutrino: right-handed
- neutrino: supernova
- neutrino: oscillation
References(43)
Figures(2)