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新山 雅之 所属 京都産業大学 理学部 物理科学科 職種 教授 |
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| 発行・発表の年月 | 2023/01 |
| 形態種別 | その他 |
| 標題 | Search for lepton-flavor-violating $τ$ decays into a lepton and a vector meson using the full Belle data sample |
| 執筆形態 | その他 |
| 著者・共著者 | Belle Collaboration,N. Tsuzuki,K. Inami,I. Adachi,H. Aihara,D. M. Asner,H. Atmacan,T. Aushev,R. Ayad,V. Babu,Sw. Banerjee,P. Behera,K. Belous,J. Bennett,M. Bessner,B. Bhuyan,T. Bilka,D. Biswas,D. Bodrov,J. Borah,A. Bozek,M. Bračko,P. Branchini,T. E. Browder,A. Budano,M. Campajola,D. Červenkov,M. -C. Chang,B. G. Cheon,K. Chilikin,H. E. Cho,K. Cho,S. -J. Cho,S. -K. Choi,Y. Choi,S. Choudhury,D. Cinabro,J. Cochran,S. Das,N. Dash,G. De Nardo,G. De Pietro,R. Dhamija,F. Di Capua,Z. Doležal,T. V. Dong,D |
| 概要 | Charged-lepton-flavor-violation is predicted in several new physics
scenarios. We update the analysis of $\tau$ lepton decays into a light charged lepton ($\ell$ = $e^{\pm}$ or $\mu^{\pm}$) and a vector meson ($V^0$ = $\rho^0$, $\phi$, $\omega$, $K^{\ast0}$, or $\overline{K}{}^{\ast0}$) using 980 fb$^{-1}$ of data collected with the Belle detector at the KEKB collider. No significant excess of such signal events is observed, and thus 90% credibility level upper limits are set on the $\tau \rightarrow \ell V^0$ branching fractions in the range of (1.7--$4.3) \times 10^{-8}$. These limits are improved by 30% on average from the previous results. |
| DOI | 10.1007/JHEP06(2023)118 |
| PermalinkURL | http://arxiv.org/abs/2301.03768v3 |
| researchmap用URL | http://arxiv.org/pdf/2301.03768v3 |