Exclusive Production of Quarkonia in $pp$ and $p \bar p$ Collisions Far from the Threshold

TL;DR

This paper analyzes the mechanisms behind exclusive production of certain mesons in high-energy proton-proton and proton-antiproton collisions, comparing diffractive and nondiffractive processes using various gluon distribution models.

Contribution

It provides a comparative study of diffractive and nondiffractive mechanisms for meson production with different unintegrated gluon distribution functions.

Findings

Differential distributions are presented and discussed.

Different UGDF models yield varying predictions.

Insights into the dominant production mechanisms at high energies.

Abstract

I discuss exclusive production of the $\eta'$, $J/\psi$, and $\chi_c(0^+)$ mesons in $pp$ and $p \bar p$ collisions at high energies. QCD diffractive mechanisms as well as nondiffractive mechanisms are discussed. Different unintegrated gluon distribution functions (UGDF) are used. Some differential distributions are shown and discussed.