Photon interactions and chiral dynamics

TL;DR

This paper evaluates the twist-2 components of photon distribution amplitudes within chiral quark models, evolving the results to higher scales for experimental and lattice QCD comparison, and analyzes related form factors and couplings.

Contribution

It provides a dynamical prediction of photon distribution amplitudes from chiral dynamics, connecting low-scale models to high-scale experimental and lattice data.

Findings

Computed twist-2 photon distribution amplitudes in chiral quark models.

Evolved results to higher energy scales relevant for experiments.

Analyzed form factors and coupling constants related to photon interactions.

Abstract

Twist-2 components of the real and virtual photon distribution amplitudes are evaluated in several chiral quark models. The results, obtained at the quark model scale, are then evolved to higher scales, probed in experiments or in lattice QCD. We also analyze the related form factors and coupling constants. Our results are a genuine dynamical prediction, following from the chiral dynamics.