Constraints on decaying right-handed Majorana neutrinos from SN 1987A observations

Details Constraints on decaying right-handed Majorana neutrinos from SN 1987A observations Constraints on decaying right-handed Majorana neutrinos from SN 1987A observations

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989phrvd..39.1378m&link_type=abstract

Physical Review D (Particles and Fields), Volume 39, Issue 5, 1 March 1989, pp.1378-1385

Physics

7

Scientific paper

We show that recently derived limits on the strength of right-handed interactions from SN 1987A observations hold even in the presence of mixing between left- and right-handed Majorana neutrinos and combined with cosmology lead to a strong bound on this neutrino mixing. By supplementing this with bounds on the flux of 512-keV x rays we are able to extend the bound on the left-right mixing parameter ζ further. In the conventional ``seesaw'' picture, the above results imply that the right-handed Majorana neutrino in left-right-symmetric theories must be heavier than 100 MeV or lighter than 65 eV. We then show that, using the results of neutrinoless double-β &<=100 MeV without recourse to the seesaw assumption.

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