The Mont Blanc neutrinos from SN 1987A: Could they have been $m^2=-0.38 keV^2$ tachyons?

摘要

Here we consider one truly exotic explanation of the Mont Blanc neutrinoburst from SN 1987A, namely faster-than-light neutrinos having $m_\nu^2=-0.38$$keV^2.$ It is shown that the Mont Blanc burst is consistent with thedistinctive signature of that explanation i.e., an 8 MeV antineutrino line fromSN 1987A. It is further shown that a model of core collapse supernovaeinvolving dark matter particles of mass 8 MeV would in fact yield just such an8 MeV neutrino line. Moreover, the dark matter model fits the observed spectrumof MeV gamma rays from the galactic center, a place where one would expectlarge amounts of dark matter to collect. Thus, a fit to those data yields themodel's dark matter mass, as well as the calculated source temperature andangular size, thereby supporting the existence of an 8 MeV antineutrino linefrom SN 1987A. Further support comes from the spectrum of $N\sim1000$ eventsrecorded by the Kamiokande-II detector on the day of SN 1987A, which appear toshow an 8 MeV line atop the detector background. This $\bar{\nu}$ line, ifgenuine, has been well-hidden for 30 years because it occurs very close to thepeak of the background. While this fact might ordinarily justify extremeskepticism, this disbelief should be tempered by (a) the very high statisticalsignificance of the result $(30 \sigma),$ (b) the use of a detector backgroundindependent of the SN 1987A data, and (c) the prediction of the 8 MeV$\bar{\nu}$ line (based on the Mont Blanc data and the dark matter model) beingmade {\emph{before}} its observation in the K-II data. Lastly, it is noted thatthe tachyonic interpretation of the Mont Blanc burst fits the author's earlierunconventional $3+3$ model of the neutrino mass states, and that results fromthe KATRIN experiment should prove or reject that model in a short data-takingperiod.