Implications of a purely right-handed b-decay coupling

R. N. Mohapatra*, S. Nussinov

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


We examine the implications of the hypothesis that the decays of the bottom quark occur via pure right-handed couplings. We show that the existing lower limits on the lifetimes for neutrinoless double beta decay severely restrict the neutrino sector of the model and would be satisfied in a manner if there is either an Le - Lμ or an Le - Lτ symmetry in the model. We then show that the cosmological mass density constraints in combination with SN1987A observations imply lower bounds on the masses of the right-handed neutrinos of about 100 MeV (about 65 MeV if there are Goldstone bosons coupling to νR's) and also imply that the case of Le - Lμ symmetry is consistent with data unless there are off-diagonal neutral currents involving the right-handed neutrinos.

Original languageEnglish
Pages (from-to)101-108
Number of pages8
JournalPhysics Letters B
Issue number1-2
StatePublished - 10 Nov 1994
Externally publishedYes


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