2021年10月
Search for lepton-flavor-violating tau-lepton decays to ℓγ at Belle
Journal of High Energy Physics
- 巻
- 2021
- 号
- 10
- 記述言語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1007/jhep10(2021)019
- 出版者・発行元
- Springer Science and Business Media LLC
Abstract
Charged lepton flavor violation is forbidden in the Standard Model but possible in several new physics scenarios. In many of these models, the radiative decays τ± → ℓ±γ (ℓ = e, μ) are predicted to have a sizeable probability, making them particularly interesting channels to search at various experiments. An updated search via τ± → ℓ±γ using full data of the Belle experiment, corresponding to an integrated luminosity of 988 fb−1, is reported for charged lepton flavor violation. No significant excess over background predictions from the Standard Model is observed, and the upper limits on the branching fractions, $$ \mathcal{B} $$(τ± → μ±γ) ≤ 4.2 × 10−8 and $$ \mathcal{B} $$(τ± → e±γ) ≤ 5.6 × 10−8, are set at 90% confidence level.
Charged lepton flavor violation is forbidden in the Standard Model but possible in several new physics scenarios. In many of these models, the radiative decays τ± → ℓ±γ (ℓ = e, μ) are predicted to have a sizeable probability, making them particularly interesting channels to search at various experiments. An updated search via τ± → ℓ±γ using full data of the Belle experiment, corresponding to an integrated luminosity of 988 fb−1, is reported for charged lepton flavor violation. No significant excess over background predictions from the Standard Model is observed, and the upper limits on the branching fractions, $$ \mathcal{B} $$(τ± → μ±γ) ≤ 4.2 × 10−8 and $$ \mathcal{B} $$(τ± → e±γ) ≤ 5.6 × 10−8, are set at 90% confidence level.
- リンク情報
- ID情報
-
- DOI : 10.1007/jhep10(2021)019
- eISSN : 1029-8479