Study of polarized gluon distributions in diffractive reactions at HERA

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.

Comments: 4 pages, latex, 4 figures, to be published in Proc. of the Workshop "Polarized Protons at High Energies - Accelerator Challenges and Physics Opportunities", 17-20 May 1999, DESY, Hamburg