|
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 | Exclusive $B^0 \to π^- \ell^+ ν_\ell$ Decays with Hadronic Full Event Interpretation Tagging in 34.6 fb$^{-1}$ of Belle II Data |
| 執筆形態 | その他 |
| 著者・共著者 | Belle II Collaboration,F. Abudinén,I. Adachi,R. Adak,K. Adamczyk,P. Ahlburg,J. K. Ahn,H. Aihara,N. Akopov,A. Aloisio,F. Ameli,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,M. Bauer,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. Bianchi |
| 概要 | We present the results of the re-discovery of the decay $B^0 \to \pi^- \ell^+
\nu_\ell$ in 34.6 fb$^{-1}$ of Belle II data using hadronic $B$-tagging via the Full Event Interpretation algorithm. We observe 21 signal events on a background of 155 in a fit to the distribution of the square of the missing mass, $M_{\mathrm{miss } }^2$, with a significance of 5.69$\sigma$, and determine a total branching fraction of (1.58 $\pm$ 0.43$_{\mathrm{stat } }$ $\pm$ 0.07$_{\mathrm{sys } }$) $\times 10^{-4}$. |
| PermalinkURL | http://arxiv.org/abs/2008.08819v1 |
| researchmap用URL | http://arxiv.org/pdf/2008.08819v1 |