论文标题
$ \ bar {b} _ {（s）}^0 \ to d^{（\ ast）+} _ {（s）} \lbraceπ^ - ，k^ - \ rbrace $ rbrace $ rbrace $ rbrace $ rbrace $ rbrace $ rbrace $
Implications for new physics from a novel puzzle in $\bar{B}_{(s)}^0 \to D^{(\ast)+}_{(s)} \lbrace π^-, K^- \rbrace$ decays
论文作者
论文摘要
最近，$ b $ -Meson HADRONIC衰变的标准模型预测，$ \ bar {b}^0 \ to d^{（\ ast）+} k^ - $和$ \ bar {b}^0_s \ to d^{（\ ast）+}+}+} _sπ^ - $，已更新了QC。这种改进阐明了$ b $ - 米森耐药衰减中的新难题：数据与预测的分支比率之间存在轻度但普遍的张力。假设高阶QCD校正不足以解决张力，我们检查了该难题的几种新物理学解释。我们发现张力可以通过左手$ W^\ Prime $模型部分解释，该模型可以与其他风味可观察物和对撞机界限兼容。
Recently, the standard model predictions for the $B$-meson hadronic decays, $\bar{B}^0 \to D^{(\ast)+}K^-$ and $\bar{B}^0_s \to D^{(\ast)+}_s π^-$, have been updated based on the QCD factorization approach. This improvement sheds light on a novel puzzle in the $B$-meson hadronic decays: there are mild but universal tensions between data and the predicted branching ratios. Assuming the higher-order QCD corrections are not huge enough to solve the tension, we examine several new physics interpretations of this puzzle. We find that the tension can be partially explained by a left-handed $W^\prime$ model, which can be compatible with other flavor observables and collider bounds.
