Search for a heavy neutrino in $\tau$ decays at Belle
Physical Review Letters 131 (2023) 211802 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 $e^+e^-$ colli...
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Physical Review Letters 131 (2023) 211802 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$^2$. |
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DOI: | 10.48550/arxiv.2212.10095 |