论文标题
半抑制B衰减来自Belle II早期数据
Semileptonic B decay results from early Belle II data
论文作者
论文摘要
Belle II在Superkekb Energy-Asmmetric $ e^+ E^ - $ Collider的实验是Belle的B工厂设施的大量升级。 SuperKekb的主要操作已于2019年3月开始，碰撞一直持续到2019年7月，达到峰值光度为$ 5.5 \ times 10^{33} $ cm $ $^{ - 2} $ s $ s $^{ - 1} $。此处介绍的结果是从0.41 fb $^{ - 1} $的收集数据的子集获得的。在会议上介绍的海报中，显示了半乳头$ \ textit {b} $ - 梅森衰减的第一个结果。分析了完整事件解释（FEI）标签的性能。 $ b^0 \ rightarrow d^{* - } \ ell^+ν_ {\ ell} $模式使用未标记的方法重新发现。
The Belle II experiment at the SuperKEKB energy-asymmetric $e^+ e^-$ collider is a substantial upgrade of the B factory facility, Belle, at the Japanese KEK laboratory. The main operation of SuperKEKB has started in March 2019, and collisions ran until July 2019, achieving a peak luminosity of $5.5\times 10^{33}$ cm$^{-2}$s$^{-1}$. The results presented here were obtained from a subset of collected data of 0.41 fb$^{-1}$. In the poster presented at the conference the first results from studying semileptonic $\textit{B}$-meson decays were shown. The performance of the Full Event Interpretation (FEI) tagging was analysed. The $B^0 \rightarrow D^{*-} \ell^+ ν_{\ell}$ mode was rediscovered, using the untagged approach.
