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arXiv · hep-ph/9408281

Implications of a Purely Right-Handed Bottom Quark Decay Coupling

R. N. Mohapatra·S. Nussinov
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Abstract

We examine the implications of the hypothesis that the decays of the b-quark occur via pure right-handed couplings. We show that the existing lower limits on neutrinoless double beta decay imply that any gauge model realizing this idea must have either an $L_e-L_μ$ or $L_e-L_τ$ symmetry. We then show that constraints of cosmology together with observations from SN1987A imply that the right-handed neutrinos in this model must be heavier than about 100 MeV in general. In one special case with the $L_e-L_μ$ symmetry, the $ν_{τ_R}$ is heavier than 2 GeV so that this particular version of the model is already ruled out.

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R. N. Mohapatra, S. Nussinov. 1994-08-12. Implications of a Purely Right-Handed Bottom Quark Decay Coupling. https://doi.org/10.1016/0370-2693(94)91140-1

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