Model-independent Description of B→ D Πℓν Decays

Erik J. Gustafson,Florian Herren,Ruth S. Van de Water,Raynette van Tonder,Michael L. Wagman

arXiv · Phenomenology（2024）

Fermi National Accelerator Laboratory | Universität Zürich Physics Institute | McGill University Department of Physics

Cited 0|Views13

Abstract

In this contribution we present a novel, model-independent description ofsemileptonic B→ D πℓν decays. In addition, we discussrecent developments in the understanding of coupled-channel D π-Dη-D_s K S-wave scattering and, for the first time, apply them tosemileptonic decays. We not only obtain model-independent predictions forkinematic distributions in B→ D πℓν decays, but also ruleout the hypothesis that the gap between the inclusive B→ Xℓνbranching fraction and the sum over exclusive channels is made up predominantlyby B→ D^(∗)ηℓν decays.

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【要点】：本研究提出了一个新颖的、模型无关的描述，用于半轻电子偶B→Dπ轻子ν衰变，并将耦合通道Dπ-Dη-D_s K S波散射的理解应用于半轻衰变，首次获得了模型无关的预测。

【方法】：研究采用了模型无关的方法。

【实验】：实验通过对B→Dπℓν衰变的动力学分布进行预测，挑战了认为 inclusive B→Xℓν分支比与独家通道之和之间的差距主要是由B→D^(∗)ηℓν衰变构成的假设。使用数据集名称未提及，但结果表明该方法在半轻衰变描述中具有应用价值。

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