A proposal to solve some puzzles in semileptonic B decays

TL;DR

This paper reviews persistent issues in semileptonic B decay measurements and proposes a potential solution to address multiple longstanding puzzles, including decay rate discrepancies and channel composition.

Contribution

It introduces a novel proposal aimed at resolving key tensions in semileptonic B decay data that have challenged previous theoretical and experimental understanding.

Findings

Potential resolution to the 1/2 vs. 3/2 puzzle

Improved understanding of decay rate composition

Alleviation of experimental-theoretical tensions

Abstract

Some long-standing problems in the experimental data for semileptonic b -> c l nu decay rates have resisted attempts to resolve them, despite substantial efforts. We summarize the issues, and propose a possible resolution, which may alleviate several of these tensions simultaneously, including the "1/2 vs. 3/2 puzzle" and the composition of the inclusive decay rate in terms of exclusive channels.