Neutrino decay catalyzed by the Mikheyev-Smirnov-Wolfenstein effect

Details Neutrino decay catalyzed by the Mikheyev-Smirnov-Wolfenstein effect Neutrino decay catalyzed by the Mikheyev-Smirnov-Wolfenstein effect

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988phrvd..38.1317r&link_type=abstract

Physical Review D (Particles and Fields), Volume 38, Issue 4, 15 August 1988, pp.1317-1320

Physics

29

Scientific paper

A new mechanism for neutrino (ν) decay in the Mikheyev-Smirnov-Wolfenstein (MSW) regime of weak mixing and small ν mass differences is pointed out. Even though electron-neutrinos (νe) in this regime are practically stable, in solar matter, conversion of the νe to a ``heavier'' flavor by the MSW effect can catalyze ν decay. MSW+ν decay into Majorons can lead to a strong solar antineutrino signal in proposed experiments, directly probing ν-Majoron couplings ~700 times smaller than the present laboratory bound of g2<4.5×10-5.

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