| Issue |
EPJ Web Conf.
Volume 137, 2017
XIIth Quark Confinement and the Hadron Spectrum
|
|
|---|---|---|
| Article Number | 13005 | |
| Number of page(s) | 4 | |
| Section | Poster Session | |
| DOI | https://doi.org/10.1051/epjconf/201713713005 | |
| Published online | 22 March 2017 | |
https://doi.org/10.1051/epjconf/201713713005
Branching ratio estimates of τ− → π−η(′)ντ decays
1 Grup de Física Teòrica, Departament de Física, Universitat Autònoma de Barcelona, E-08193 Bellaterra (Barcelona), Spain
2 Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology (BIST), Campus UAB, E-08193 Bellaterra (Barcelona), Spain
a e-mail: rescriba@ifae.es
Published online: 22 March 2017
We study the rare τ− → π−η(′)ντ decays. These processes occur via isospin violation and belong to the so-called second-class currents unseen in Nature so far. Our analysis is based on the framework of resonance chiral theory supplemented by dispersion relations. In this contribution we discuss the prospects for their discovery at forthcoming B-factories such Belle-II. While we find a total branching fraction for the π−η decay mode of ~1.7 × 10−5, well within the reach of Belle-II, the π−η′ channel might be one or two orders of magnitude more suppressed.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.