PoS - Proceedings of Science
Volume 414 - 41st International Conference on High Energy physics (ICHEP2022) - Beyond the Standard Model
Search for Heavy Neutral Leptons in $tau$-lepton decays with the $BABAR$ detector.
S. Middleton
Full text: pdf
Pre-published on: August 21, 2022
Published on:
A model independent search for a Heavy Neutral Lepton (HNL), capable of mixing with the $\tau$ neutrino, is presented. A total of 424 $fb^{-1}$ of ~\babar~ data is analyzed. No significant signal is seen. Upper limits at the 95 $\%$ confidence level are set on the extended Pontecorvo–Maki–Nakagawa–Sakata (PMNS) matrix element, $|U_{\tau 4}|^{2}$, which depend on the HNL mass hypothesis and vary from $2.31 \times 10^{-2}$ to $5.04 \times 10^{-6}$, across the mass range $100 < m_{4} < 1300 ~\text{MeV}/c^{2}$. More stringent limits being placed at higher masses.
DOI: https://doi.org/10.22323/1.414.0159
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.