# Higher-twist B-meson Distribution Amplitudes in HQET

## TL;DR

This paper analyzes higher-twist B-meson distribution amplitudes within QCD factorization, providing exact solutions for their renormalization group equations and proposing models for phenomenological applications.

## Contribution

It offers the first exact solutions to the renormalization group equations for three-particle distributions in the large N_c limit and introduces practical models for higher-twist DAs.

## Key findings

- RG equations are integrable in the large N_c limit
- Exact solutions for three-particle distributions are obtained
- Proposed models satisfy all known constraints

## Abstract

We present a systematic study of higher-twist distribution amplitudes (DAs) of the B-meson which give rise to power-suppressed $1/m_B$ contributions to B-decays in final states with energetic light particles in the framework of QCD factorization. As the main result, we find that the renormalization group equations for the three-particle distributions are completely integrable in the large $N_c$ limit and can be solved exactly. General properties of the solutions are studied. We propose simple models for higher-twist DAs which satify all existing constraints and can be used in phenomenological studies.