Lepton number violation in tau lepton decays

Recent studies of novel four-body lepton number violating decays of $\tau$ leptons and neutral $B$ mesons are summarized and updated. These decays are assumed to be enhanced by the exchange of resonant Majorana neutrinos. It is shown that the $\tau^- \to \pi^+l^-l^-\nu_{\tau}$ decay channels, with $...

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Bibliographic Details
Main Authors Castro, Gabriel Lopez, Quintero, Nestor
Format Journal Article
LanguageEnglish
Published 30.11.2012
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Summary:Recent studies of novel four-body lepton number violating decays of $\tau$ leptons and neutral $B$ mesons are summarized and updated. These decays are assumed to be enhanced by the exchange of resonant Majorana neutrinos. It is shown that the $\tau^- \to \pi^+l^-l^-\nu_{\tau}$ decay channels, with $l=e$ or $\mu$, can provide stronger constraints on the mixing vs. mass parameter space of resonant Majorana neutrinos than analogous three-body decays of charged $B$ mesons.
DOI:10.48550/arxiv.1212.0037