PoS - Proceedings of Science
Volume 340 - The 39th International Conference on High Energy Physics (ICHEP2018) - Posters
Measurement of the of $\tau^- \rightarrow \pi^- \nu_{\tau} e^+ e^-$ branching fraction by Belle
Y. Jin*, D. Epifanov, H. Aihara and  On behalf of the BELLE Collaboration
Full text: pdf
Published on: August 02, 2019
Preliminary result of the measurement of the branching fraction of rare tau decay, $\tau^- \rightarrow \pi^- \nu_{\tau} e^+ e^-$, is presented. A 562 $\rm fb^{-1}$ data set collected with Belle detector at the KEKB asymmetric-energy $\rm e^+ e^-$ collider is used. The branching fraction of $\tau^- \rightarrow \pi^- e^+ e^- \nu_\tau$ is measured to be $\mathcal{B}(\tau^ \rightarrow \pi^- e^+ e^- \nu_\tau) = (2.11 \pm 0.19 \pm 0.30) \times 10^{-5}$, where the first uncertainty is statistical and the second is systematic. The measured result is consistent with the theoretical prediction from the Standard Model and could facilitate searches for physics beyond the Standard Model.
DOI: https://doi.org/10.22323/1.340.0915
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.