Does the 17 keV neutrino annihilate in the early universe?

Details Does the 17 keV neutrino annihilate in the early universe? Does the 17 keV neutrino annihilate in the early universe?

Jun 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992zphyc..54..317f&link_type=abstract

Zeitschrift für Physik C Particles and Fields, Volume 54, Issue 2, pp.317-321

Mathematics

Logic

Scientific paper

Recent experiments indicate that the electron neutrino contains a heavy 17 keV component. If these experiments and their interpretation are correct then this will require a modification of the minimal standard model. The standard cosmological model gives significant constraints on the properties of a 17 keV neutrino. It is usually assumed that these constraints imply that the 17 keV neutrino must decay rapidly into Goldstone bosons. We construct a class of gauge models which describe the 17 keV neutrino but which do not involve Goldstone bosons. The 17 keV neutrino is long lived, but annihilates sufficiently in the early universe so that its present day abundance is cosmologically acceptable.

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