论文标题
在Belle II的半雌科和electroweak企鹅衰减的最新结果
Latest results on semileptonic and electroweak penguin decays at Belle II
论文作者
论文摘要
Belle〜II合作提供了四个新分析：$ v_ {ub} $从$ b \ toπeν_e$衰减的测量值适合差异$ q^2 $ pspectrum，确定$ v_ {cb} $的确定，使用$ w $ w $ w $ w $ w $ w $ w $，腐烂，$ q^2 $ iments的测量值$ b \ to x_c \ellν_\ ell $衰减。在所有这些分析中，标签$ b $ meson都是在完全harronic衰减链中重建的。最后的结果是使用未标记方法的$ b \ to k^\ ast \ ell^+ \ ell^ - $衰减的分支分数测量。
The Belle~II Collaboration presents four new analyses: The measurement of $V_{ub}$ from $B \to πe ν_e$ decays with a fit to the differential $q^2$ spectrum, the determination of $V_{cb}$ using a fit to the differential $w$ distribution from $B^0 \to D^{\ast -} \ell^+ ν_\ell$ decays, and the measurement of $q^2$ moments in inclusive $B \to X_c \ell ν_\ell$ decays. In all these analyses tag-side $B$ meson is reconstructed in a fully hadronic decay chain. The last result are branching fraction measurement of $B \to K^\ast \ell^+ \ell^-$ decays using an untagged approach.
