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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 | 2023/09 |
| 形態種別 | その他 |
| 標題 | Search for charged-lepton flavor violation in $Υ(2S) \to \ell^\mpτ^\pm$ ($\ell=e,μ$) decays at Belle |
| 執筆形態 | その他 |
| 著者・共著者 | R. Dhamija,S. Nishida,A. Giri,I. Adachi,H. Aihara,D. M. Asner,T. Aushev,R. Ayad,V. Babu,S. Bahinipati,Sw. Banerjee,M. Bauer,P. Behera,K. Belous,J. Bennett,M. Bessner,V. Bhardwaj,D. Biswas,D. Bodrov,J. Borah,A. Bozek,M. Bračko,P. Branchini,T. E. Browder,A. Budano,M. Campajola,D. Červenkov,M. -C. Chang,P. Chang,V. Chekelian,B. G. Cheon,K. Chilikin,H. E. Cho,K. Cho,S. -K. Choi,Y. Choi,S. Choudhury,D. Cinabro,S. Das,G. De Nardo,G. De Pietro,F. Di Capua,J. Dingfelder,Z. Doležal,T. V. Dong,P. Ecker,D. |
| 概要 | We report a search for the charged-lepton flavor violation in $\Upsilon(2S)
\to \ell^\mp\tau^\pm$ ($\ell=e,\mu$) decays using a $25~\fbi$ $\Upsilon(2S)$ sample collected by the Belle detector at the KEKB $e^{+}$$e^-$ asymmetric-energy collider. We find no evidence for a signal and set upper limits on the branching fractions ($\mathcal{B}$) at 90\% confidence level. We obtain the most stringent upper limits: $\mathcal{B}(\Ytomutau) < 0.23 \times 10^{-6}$ and $\mathcal{B}(\Ytoetau) < 1.12 \times 10^{-6}$. |
| PermalinkURL | http://arxiv.org/abs/2309.02739v2 |
| researchmap用URL | http://arxiv.org/pdf/2309.02739v2 |