Diffraction and an infrared finite gluon propagator

TL;DR

This paper explores the phenomenological implications of an infrared finite gluon propagator with a dynamical gluon mass, analyzing its effects on various diffractive scattering processes and related reactions.

Contribution

It introduces a model of an infrared finite gluon propagator with a dynamical mass and applies it to describe diffractive scattering and photoproduction data.

Findings

The dynamical gluon mass influences $pp$ and $ar{p}p$ diffractive scattering.

Data on $ ext{γ}p$ photoproduction can be explained via vector meson dominance.

Hadronic $ ext{γ}γ$ reactions are derived from forward scattering amplitudes.

Abstract

We discuss some phenomenological applications of an infrared finite gluon propagator characterized by a dynamically generated gluon mass. In particular we compute the effect of the dynamical gluon mass on $pp$ and ${\bar{p}}p$ diffractive scattering. We also show how the data on $\gamma p$ photoproduction and hadronic $\gamma \gamma$ reactions can be derived from the $pp$ and $\bar{p}p$ forward scattering amplitudes by assuming vector meson dominance and the additive quark model.