Search for lepton-number- And baryon-number-violating tau decays at Belle

(Belle Collaboration)

Research output: Contribution to journalArticlepeer-review

Abstract

We search for lepton-number- and baryon-number-violating decays τ-→p¯e+e-, pe-e-, p¯e+μ-, p¯e-μ+, p¯μ+μ-, and pμ-μ- using 921 fb-1 of data, equivalent to (841±12)×106 τ+τ- events, recorded with the Belle detector at the KEKB asymmetric-energy e+e- collider. In the absence of a signal, 90% confidence-level upper limits are set on the branching fractions of these decays in the range (1.8-4.0)×10-8. We set the world's first limits on the first four channels and improve the existing limits by an order of magnitude for the last two channels.

Original languageEnglish
Article number111101
JournalPhysical Review D
Volume102
Issue number11
DOIs
Publication statusPublished - 2020 Dec 24

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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