论文标题
通过分散矩阵方法衰减半乳房重型$ b $的新颖方法
A novel approach to semileptonic heavy-to-light $B$ decays through the Dispersive Matrix method
论文作者
论文摘要
在这项贡献中，我们通过分散矩阵方法分析了重度到光$ B $衰减，一旦晶格QCD计算了HADRONIC形态和相关的敏感性，可以将其应用于任何半蛋白质衰减。我们将明确地讨论分散矩阵方法的应用$ b \ toπ\ellν_{\ ell} $和$ b_s \ to K \ellν_{\ ell} $衰减。与我们的分析策略一样，只有在高度转移值下的FFS的LQCD计算将用于确定整个运动学范围内FFS的形状，而无需对其动量依赖性做出任何假设。然后，实验数据将仅用于获得我们的最终独家确定$ \ vert v_ {ub} \ vert $。通过这种方式，我们对FFS的计算允许获得几量现象学兴趣的纯理论估计值，例如，差异衰减率的$τ/μ$比率$ r_ {π（k）}^{τ/μ} $，这是测试Lepton味道味道的重要工具。我们还将摘要摘要，以迄今为止在分散矩阵方法中为半抑制的$ b $衰减获得的所有结果。
In this contribution we analyse the heavy-to-light $B$ decays through the Dispersive Matrix method, which can be applied to any semileptonic decays of hadrons once lattice QCD computations of the hadronic Form Factors and of the relevant susceptibilities are available. We will explicitly discuss the application of the Dispersive Matrix approach to both $B \to π\ell ν_{\ell}$ and $B_s \to K \ell ν_{\ell}$ decays. As usual in our analysis strategy, only LQCD computations of the FFs at high values of the momentum transfer will be used to determine the shape of the FFs in the whole kinematical range without making any assumption on their momentum dependence. Then, the experimental data will be used only to obtain our final exclusive determinations of $\vert V_{ub} \vert$. In this way, our calculation of the FFs allows to obtain pure theoretical estimates of several quantities of phenomenological interest, for instance the $τ/μ$ ratio of the differential decay rates $R_{π(K)}^{τ/μ}$, which is an important tool for testing Lepton Flavour Universality. We will also present a summary of all the results obtained so far for semileptonic $B$ decays within the Dispersive Matrix approach.
