TWO--SPIN ASYMMETRY OF HEAVY QUARKONIA PRODUCTIONS AT RHIC ENERGY

Abstract

Hadroproductions of charmonium and bottomonium ${\chi }_J$ in polarized $pp$ collisions at RHIC energies are studied. Two--spin asymmetries $A_{LL}^{{\chi }_J}(pp)$ for these reactions are very good parameters for examining the polarized gluon distributions in a proton.

Comments: LaTeX file, 8 pages+5 figures not included (available upon request), Talk delivered at 10th Lake Louise Winter Institute, Lake Louise (Canada), Feb. 19-25, 1995