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Search for a heavy neutrino in τ decays at Belle
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Search for a heavy neutrino in τ decays at Belle
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We report on a search for a heavy neutrino in the decays $\tau^- \to \pi^- \nu_h$, $\nu_h \to \pi^\pm \ell-+$, $\ell = e, \mu$. The results are obtained using the full data sample collected with the Belle detector at the KEKB asymmetric energy $e^+e^-$ collider. We observe no significant signal and set 90% CL upper limits on the couplings of the heavy right-handed neutrinos to the conventional SM left-handed neutrinos in the mass range 0.2-1.6 GeV/c$^2$.
Forward citations
Cited by 2 Pith papers
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Long-lived sterile neutrinos from axionlike particles at the Super Tau-Charm Facility
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