A proposal to solve some puzzles in semileptonic B decays

Understand

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.