Flavourful hadronic physics

TL;DR

This paper reviews theoretical methods for calculating hadronic form factors in heavy-meson decays, emphasizing non-perturbative QCD approaches like Dyson-Schwinger equations, and compares model predictions with recent results.

Contribution

It provides a comprehensive overview of evolving theoretical techniques for hadronic form factors, highlighting Dyson-Schwinger equations and recent results for specific decay couplings.

Findings

Comparison of model predictions for B→π form factor

New results for g_{D*Dπ} coupling in D* decay

Discussion of non-perturbative QCD techniques

Abstract

We review theoretical approaches to form factors that arise in heavy-meson decays and are hadronic expressions of non-perturbative QCD. After motivating their origin in QCD factorisation, we retrace their evolution from quark-model calculations to non-perturbative QCD techniques with an emphasis on formulations of truncated heavy-light amplitudes based upon Dyson-Schwinger equations. We compare model predictions exemplarily for the B\to\pi transition form factor and discuss new results for the g_{D*D\pi} coupling in the hadronic D* decay.