Parton--Hadron Duality in B Meson Decays

TL;DR

This paper reviews the concept of Parton-Hadron duality in B meson decays, emphasizing the importance of the OPE framework and discussing the current understanding of duality violations and their impact on theoretical predictions.

Contribution

It clarifies the role of OPE in formulating duality and demonstrates the effective extraction of the b quark mass, highlighting the progress in theoretical control.

Findings

Duality violations are unlikely to limit semileptonic B decay predictions.

OPE is essential for properly understanding duality in B decays.

Accurate extraction of the b quark mass showcases theoretical advancements.

Abstract

We summarize the current view on Parton-Hadron duality as it applies to B meson decays. It is emphasized that an OPE treatment is essential for properly formulating duality and its limitations. Duality violations are unlikely to become the limiting factor in describing semileptonic B width vis-a-vie higher order corrections. The consistent extraction of the b quark mass from B production and decays provides a striking example of the theoretical control achieved.