# Hadron Spectroscopy in Double Pomeron Exchange Experiments

## TL;DR

This paper reviews how central exclusive production in high-energy hadron collisions, dominated by pomeron exchange, can be used to study mesonic states like glueballs, focusing on isoscalar tensor and scalar mesons.

## Contribution

It provides an overview of experimental data on meson spectroscopy via double pomeron exchange, highlighting the potential to identify gluon-rich states such as glueballs.

## Key findings

- Large rapidity gaps indicate pomeron exchange dominance.
- Isoscalar JPC = 0++ and 2++ mesons are accessible.
- Soft pomeron exchange favors gluon-dominated states.

## Abstract

Central exclusive production in hadron-hadron collisions at high energies, for example p + p -> p + X + p, where the "+" represents a large rapidity gap, is a valuable process for spectroscopy of mesonic states X. At collider energies the gaps can be large enough to be dominated by pomeron exchange, and then the quantum numbers of the state X are restricted. Isoscalar JPC = 0++ and 2++ mesons are selected, and our understanding of these spectra is incomplete. In particular, soft pomeron exchanges favor gluon-dominated states such as glueballs, which are expected in QCD but not yet well established. I will review some published data.