Light-Cone Distribution Amplitudes for Non-Relativistic Bound States

TL;DR

This paper calculates light-cone distribution amplitudes for non-relativistic bound states, incorporating relativistic gluon exchange corrections, to improve understanding of hard exclusive reactions involving such states in QCD.

Contribution

It provides the first-order relativistic correction calculations for light-cone distribution amplitudes of non-relativistic bound states within QCD.

Findings

Results applicable to B_c, eta_c, J/psi, and eta_c production processes.

Serves as a toy model for light mesons and heavy B, D mesons.

Enhances theoretical tools for analyzing exclusive reactions.

Abstract

We calculate light-cone distribution amplitudes for non-relativistic bound states, including radiative corrections from relativistic gluon exchange to first order in the strong coupling constant. Our results apply to hard exclusive reactions with non-relativistic bound states in the QCD factorization approach like, for instance, [B_c -> eta_c l nu] or [e+ e- -> J/psi eta_c]. They also serve as a toy model for light-cone distribution amplitudes of light mesons or heavy B and D mesons.