Investigating exclusive $\rho^0$ photoproduction within the Regge phenomenology approach

TL;DR

This paper evaluates $ ho^0$ photoproduction cross sections using Regge phenomenology, comparing models to experimental data from H1, CMS, and ALICE, and extends analysis to nuclear collisions.

Contribution

It introduces a nonperturbative Pomeron exchange model for $ ho^0$ photoproduction and compares three Regge-based models to recent experimental data.

Findings

Models agree with H1 and CMS data within uncertainties.

Predictions for nuclear $ ho^0$ production match ALICE measurements.

Theoretical uncertainties and limitations are analyzed.

Abstract

The elastic differential and integrated total cross section for the exclusive $\rho^0$ photoproduction in electron-proton ($ep$) collisions are evaluated taking into account nonperturbative Pomeron exchange approach. By using three different models based on Regge phenomenology the results are compared to recent measurements by H1 Collaboration in $ep$ collisions and by the CMS collaboration from ultraperipheral proton-lead collisions. The analysis is expanded by calculating the coherent nuclear cross section, $\sigma (\gamma A\rightarrow \rho^0 A)$, which is applied to $\rho^0$ production in ultraperipheral lead-lead and xenon-xenon collisions. The predictions are compared to the measurements performed by ALICE Collaboration. Aspects of the theoretical uncertainties and limitations of the formalism are scrutinized.