SciPost logo

The complete scientific publication portal
Managed by professional scientists
For open, global and perpetual access to science

SciPost Submission Page

Latest Belle results on Tau decays

by Y. Jin; D. Epifanov; H. Aihara

- Published as , 002 (2019)

Submission summary

As Contributors: Yifan Jin
Preprint link: scipost_201810_00006v2
Date accepted: 2019-01-15
Date submitted: 2018-12-03
Submitted by: Jin, Yifan
Submitted to: SciPost Physics Proceedings
Domain(s): Experimental
Subject area: High-Energy Physics - Experiment


We present preliminary results of a latest measurement at Belle, the branching fraction of rare tau decay, $\tau^- \rightarrow \pi^- \nu_{\tau} \ell^+ \ell^-$ ($\ell = e$ or $\mu$), using a 562 $\rm fb^{-1}$\ data set. The branching fraction of $\tau^- \rightarrow \pi^- e^+ e^- \nu_\tau$ is measured to be $\mathbf{ \mathcal{B}(\tau^-\rightarrow \pi^- e^+ e^- \nu_\tau) = (2.11 \pm 0.19 \pm 0.30) \times 10^{-5}}$, where the first uncertainty is statistical and the second is systematic. An upper limit is set on the branching fraction of $\tau^- \rightarrow \pi^- \mu^+ \mu^- \nu_\tau$, $\mathbf{\mathcal{B}(\tau^-\rightarrow \pi^- \mu^+ \mu^- \nu_\tau) < 1.06 \times 10^{-5}}$, at 90\% confidence level.

Current status:
Published as , 002 (2019)

Submission & Refereeing History

Resubmission scipost_201810_00006v2 (3 December 2018)
Submission scipost_201810_00006v1 (31 October 2018)

Login to report or comment