Model-independent description of B→ D πℓ ν decays

2024/03/26 by Gustafson, Erik J., Herren, Florian, Van de Water, Ruth S. +2
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2403.17501

Abstract

In this contribution we present a novel, model-independent description of semileptonic B→ D πℓ ν decays. In addition, we discuss recent developments in the understanding of coupled-channel D π-D η-D_s K S-wave scattering and, for the first time, apply them to semileptonic decays. We not only obtain model-independent predictions for kinematic distributions in B→ D πℓ ν decays, but also rule out the hypothesis that the gap between the inclusive B→ Xℓν branching fraction and the sum over exclusive channels is made up predominantly by B→ D^(∗) ηℓ ν decays.

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