Threshold photo-production of $J/\Psi$ off light nuclei

TL;DR

This paper investigates the threshold photoproduction of heavy mesons, specifically $J/ ext{\Psi}$, off light nuclei like deuteron and Helium-4, using QCD factorization and recent gluonic form factor data.

Contribution

It introduces a method to estimate $J/\Psi$ production cross sections using gluonic EMT form factors within the impulse approximation.

Findings

Differential cross sections estimated for $J/\Psi$ production off light nuclei.

Analysis based on large skewness assumption and leading twist-2 gluonic contributions.

Application of recent gluonic gravitational form factors to nuclear targets.

Abstract

We analyze threshold photoproduction of heavy mesons off a deuteron and Helium-4, using the QCD factorization method. Assuming large skewness, the production amplitude is dominated by the leading twist-2 gluonic energy-momentum tensor (EMT). We use our recent results for the gluonic gravitational form factors of light nuclei in the impulse approximation, to estimate the differential cross sections for $J/\Psi$ production off a deuteron and Helium-4 at current electron facilities.