Nonperturbative and perturbative aspects of photo- and electroproduction of vector mesons

TL;DR

This paper explores the interplay of perturbative and nonperturbative QCD effects in vector meson production, demonstrating that nonperturbative influences are significant across all photon virtualities and can explain experimental data with a simple model.

Contribution

It introduces a general method that combines perturbative and nonperturbative QCD aspects, providing a parameter-free model that successfully explains experimental results.

Findings

Nonperturbative effects are crucial at all photon virtualities Q2.

A simple nonperturbative model can explain experimental data.

Theoretical results align well with experimental observations.

Abstract

We discuss various aspects of vector meson production, first analysing the interplay between perturbative and nonperturbative aspects of the QCD calculation. Using a general method adapted to incorporate both perturbative and nonpertubative aspects, we show that nonperturbative effects are important for all experimentally available values of the photon virtuality Q2. We compare the huge amount of experimental information now available with our theoretical results obtained using a specific nonperturbative model without free parameters, showing that quite simple features are able to explain the data.