Model-Independent Description of $B\rightarrow D \pi \ell u$ Decays
Erik Gustafson, Florian Herren, R. S. Van de Water, Raynette van Tonder, Michael L. Wagman · arXiv (Cornell University) · 2024
In this contribution we present a novel, model-independent description of semileptonic $B\rightarrow D \pi \ell u$ decays. In addition, we discuss recent developments in the understanding of coupled-channel $D \pi$-$D \eta$-$D_s K$ S-wave scattering and, for the first time, apply them to semileptonic decays. We not only obtain model-independent predictions for kinematic distributions in $B\rightarrow D \pi \ell u$ decays, but also rule out the hypothesis that the gap between the inclusive $B\rightarrow X\ell u$ branching fraction and the sum over exclusive channels is made up predominantly by $B\rightarrow D^{(\ast)} \eta \ell u$ decays.