# Rare tau decays at Belle

Source: [Rare tau decays at Belle](<https://www.sota2.com/research/paper/68fa3a391e209131ce8c907e>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-24T23:56:34.920Z

Authors: K. Hayasaka

Published: 2011-11-07T11:24:07.000Z

## Abstract

We report results of a search for tau lepton decays strongly suppressed in the Standard Model based on the world-largest data sample accumulated with the Belle detector at the KEKB asymmetric-energy e+e- collider. The decays include: lepton flavor and lepton number violating tau decays into a lepton (e or mu) and two charged mesons (K or pi) as well as lepton and baryon number violating tau decays into a Lambda and a charged meson (K or pi). The sensitivity to the branching fractions is significantly improved compared to our previous results and reaches O(10^{-8}).

## Recorded benchmark results

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/1111.1545>)

[PDF](<https://arxiv.org/pdf/1111.1545.pdf>)