Spin effects in diffractive hadron photoproduction

Abstract

We study spin asymmetries in diffractive $Q\bar{Q}$ and vector meson production which are sensitive to the spin-dependent part of the two-gluon-nucleon coupling. It is found that the $A_{ll}$ and $A_{lT}$ asymmetry in diffractive reactions can be used to study polarized gluon distributions of the proton.

Comments: LaTex, 5 pages, 2 PS figures, to appear in Proc. of the 14th International Spin Physics Symposium, SPIN2000, Osaka, Japan, Oct. 16-21 2000