Study of polarized gluon distributions in diffractive reactions at HERA

TL;DR

This paper investigates how spin asymmetries in diffractive leptoproduction processes at HERA can reveal the spin structure of the pomeron-proton coupling, highlighting the suitability of the $A_{lT}$ asymmetry for such studies.

Contribution

It demonstrates that the $A_{lT}$ asymmetry is a promising observable for probing the spin structure of the pomeron-proton interaction, which is difficult to access via $A_{ll}$ asymmetry.

Findings

$A_{ll}$ asymmetry is not suitable for studying the pomeron's spin structure.

$A_{lT}$ asymmetry provides a viable method for this investigation.

The structure of the pomeron-proton coupling influences spin asymmetries in diffractive reactions.

Abstract

We consider the dependencies of spin asymmetries in the diffractive $J/\Psi$ and $Q \bar Q$ leptoproduction at HERA energies on the structure of the pomeron-proton coupling. It is shown that it is difficult to study the spin structure of the pomeron coupling with the proton from the $A_{ll}$ asymmetry. The $A_{lT}$ asymmetry is an appropriate object for this investigation.