|
新山 雅之 所属 京都産業大学 理学部 物理科学科 職種 教授 |
|
| 発行・発表の年月 | 2020/08 |
| 形態種別 | その他 |
| 標題 | Measurement of the semileptonic $\bar{B}^0 \to D^{*+} \ell^{-} ν_{\ell}$ branching fraction with fully reconstructed $B$ meson decays and 34.6 fb$^{-1}$of Belle II data |
| 執筆形態 | その他 |
| 著者・共著者 | Belle II Collaboration,F. Abudinen,I. Adachi,R. Adak,K. Adamczyk,P. Ahlburg,J. K. Ahn,H. Aihara,N. Akopov,A. Aloisio,F. Ameli,K. Amirie,L. Andricek,N. Anh Ky,D. M. Asner,H. Atmacan,V. Aulchenko,T. Aushev,V. Aushev,T. Aziz,V. Babu,S. Bacher,S. Baehr,S. Bahinipati,A. M. Bakich,P. Bambade,Sw. Banerjee,S. Bansal,M. Barrett,G. Batignani,J. Baudot,A. Beaulieu,J. Becker,P. K. Behera,M. Bender,J. V. Bennett,E. Bernieri,F. U. Bernlochner,M. Bertemes,M. Bessner,S. Bettarini,V. Bhardwaj,B. Bhuyan,F. Bianch |
| 概要 | We present a first measurement of the $\bar{B^{0 } } \rightarrow D^{*+}
\ell^{-} \nu_{\ell}$ branching fraction using fully reconstructed $B$ meson decays employing the Full Event Interpretation algorithm. Collision events corresponding to an integrated luminosity of \lumi are analyzed, which were recorded by the Belle~II detector operated at the SuperKEKB accelerator complex. We measure$\cal{B}(\bar{B^{0 } } \rightarrow D^{*+} \ell^{-} \nu_{\ell}) =4.51 \pm 0.41_{stat}\pm0.27_{syst} \pm0.45_{\pi_s}$, with the first and second error denoting the statistical and systematic uncertainty, respectively, and the third dominant uncertainty is from the slow pion reconstruction efficiency. |
| PermalinkURL | http://arxiv.org/abs/2008.10299v4 |
| researchmap用URL | http://arxiv.org/pdf/2008.10299v4 |