A search for radiative neutrino decay from supernovae.

Details A search for radiative neutrino decay from supernovae. A search for radiative neutrino decay from supernovae.

Dec 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26as..120c.635m&link_type=abstract

Astronomy and Astrophysics Supplement, v.120, p.635-636

Astronomy and Astrophysics

Astrophysics

4

Elementary Particles, Supernovae: Individual: Sn 1987A, Supernovae: Individual: Sn 1993J, Dark Matter

Scientific paper

We have performed a systematic search for massive neutrinos by looking for the characteristic photon spectrum of a possible radiative decay mode. The search was performed using the COMPTEL instrument aboard the Compton Gamma-Ray Observatory (CGRO) by observing relatively nearby type-II supernovae that are known to be copious producers of neutrinos. This search was sensitive to neutrino masses mnu_>100eV, lifetimes ~10^5^<=τnu_<=10^15^s, and branching ratios Bgamma_>=10^-5^. We have found no evidence for a radiative decay mode and thus exclude a new region of mnu_/τnu_/Bgamma_-parameter space. In addition, we have re-analyzed the null results of the observation made with the Gamma-Ray Spectrometer aboard the Solar Maximum Mission satellite measurements of SN 1987A.

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