An experimentalist's guide to the semileptonic bottom to charm branching fractions

TL;DR

This paper reviews current measurements of semileptonic bottom to charm branching fractions, compares exclusive and inclusive results, and provides derived quantities to aid future experimental analyses.

Contribution

It offers a comprehensive summary of experimental measurements and introduces derived quantities for better understanding of semileptonic branching fractions.

Findings

Sum of exclusive measurements compared with inclusive results.

Analysis of isospin extrapolation effects.

Derived quantities for charge breakdown of final states.

Abstract

This work summarizes the current status of the measured semileptonic branching fractions $B^{0,+} \to X_c \mu\nu$. The sum of exclusive measurements is compared with the inclusive determination, accounting for isospin extrapolation. Further derived quantities are computed, taking into account different explanations for the unmeasured components of the total branching fraction. These quantities focus on the charge breakdown of the final states, and are designed for use as inputs or comparisons in future experimental measurements.