Effects of the large gluon polarization on $x{g}_1^d(x)$ and J/$\psi$ productions at polarized ep and pp collisions

Abstract

The recent SMC data of $x{g}_1^d(x)$ are reproduced with the large polarized gluons. To study further the polarized gluon distribution in a proton, we calculate the spin--dependent differential cross section for J/$\psi$ leptoproductions and the two--spin asymmetry for J/$\psi$ hadroproductions. Its experimental implication is discussed.

LaTeX file, 10 pages+6 figures available upon request, KOBE-FHD-93-08

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