Baryon-to-meson transition distribution amplitudes: formalism and models

TL;DR

This paper introduces the formalism and models for baryon-to-meson transition distribution amplitudes, which are new hadronic matrix elements crucial for understanding nucleon structure in exclusive processes.

Contribution

It extends the theoretical framework by defining transition distribution amplitudes for nucleon-to-meson transitions, linking perturbative calculations with non-perturbative hadronic matrix elements.

Findings

Formalism for transition distribution amplitudes established

Models for these amplitudes proposed

Implications for nucleon structure analysis discussed

Abstract

In specific kinematics, hard exclusive amplitudes may be factorized into a short distance dominated part computable in a perturbative way on the one hand, and universal, confinement related hadronic matrix elements on the other hand. The extension of this description to processes such as backward meson electroproduction and forward meson production in antiproton-nucleon scattering leads to define new hadronic matrix elements of three quark operators on the light cone, the nucleon-to-meson transition distribution amplitudes, which shed a new light on the nucleon structure.