论文标题
$ b \ rightarrowρτν_τ$和$ b \ rightarrowωτν_τ$在SM及以后的精确预测
Precision predictions for $B \rightarrow ρτν_τ$ and $B \rightarrow ωτν_τ$ in the SM and beyond
论文作者
论文摘要
我们提出了涉及$ρ$和$ω$最终状态介子的半衰减的新精度预测。这些衰减通道提供了一个有趣的正交探测器，可以研究半二元过渡中现有的B异常，并且可以通过Belle II实验访问。这些预测是基于将现有的轻单键规则计算与Babar和Belle协作的测量实验光谱相结合。这使我们能够可靠地推断出光仪的形式预测到四摩托姆转移平方的较大值，$ q^2 $，然后得出$r_ρ$和$r_Ω$的精确预测，$ b \ rightArrowρτν_τ$和$ b \ right y $ right y $ cy $ right ocy for $r_Ω SM。此外，我们调查了所有四个Fermi操作员对半auonic $ q^2 $光谱和这些比率的影响。
We present new precision predictions for semitauonic decays involving $ρ$ and $ω$ final state mesons. These decay channels offer an interesting orthogonal probe to study the existing B anomalies in semitauonic transitions and are accessible with the Belle II experiment. The predictions are based on combining existing light-cone sum-rule calculations for the form factors with measured experimental spectra from the BaBar and Belle collaborations. This allows us to reliably extrapolate the light-lepton form factor predictions to large values of the four-momentum transfer squared, $q^2$, and in turn to derive precise predictions for $R_ρ$ and $R_ω$, the ratio of the total decay rates of $B \rightarrow ρτν_τ$ and $B \rightarrow ωτν_τ$ for $τ$ final states with respect to light leptons in the SM. In addition, we investigate the impact of all four-fermi operators on the semitauonic $q^2$ spectra and these ratios.
