Twist-4 Distribution Amplitudes of the K$^*$ and $\phi$ Mesons in QCD

TL;DR

This paper systematically analyzes the twist-4 light-cone distribution amplitudes of K* and phi mesons in QCD, including SU(3)-breaking effects, using sum rules and models, and reexamines rho meson parameters.

Contribution

It provides a comprehensive study of twist-4 distribution amplitudes for K* and phi mesons, incorporating SU(3)-breaking corrections and reanalyzing rho meson parameters with non-perturbative methods.

Findings

Detailed SU(3)-breaking correction analysis

Estimation of non-perturbative parameters from sum rules

Complete reanalysis of rho meson twist-4 parameters

Abstract

We present a systematic study of twist-4 light-cone distribution amplitudes of the $K^*$ and $\phi$ meson in QCD. The structure of SU(3)-breaking corrections is studied in detail. Non-perturbative input parameters are estimated from QCD sum rules and a renormalon based model. As a by-product, we give a complete reanalysis of the parameters of the twist-4 $\rho$-meson distribution amplitudes.