Exclusive rho^0 electroproduction on the proton : GPDs or not GPDs ?

TL;DR

This paper examines whether the exclusive rho^0 electroproduction process on the proton can be accurately described using Generalized Parton Distributions or if an effective hadronic Regge model provides a better interpretation.

Contribution

It compares GPD-based and Regge-based models to interpret rho^0 electroproduction, highlighting the conditions under which each approach is applicable.

Findings

GPDs may not fully describe the process at all energies.

Regge theory offers an alternative interpretation consistent with certain data.

The paper clarifies the domain of validity for each model.

Abstract

We discuss the interpretation of the $ep\to ep\rho^0$ process in terms of, on the one hand, Generalized Parton Distributions and, on the other hand, an effective hadronic model based on Regge theory.