Probing u-bar/d-bar Asymmetry in the Proton via Quarkonium Production

Abstract

The sensitivity of proton-induced $J/\psi$ and ${\rm Y}$ production to the possible $\bar{u}/\bar{d}$ asymmetry in the nucleon is studied. The ratio of the quarkonium production cross sections at large $x_F$ on hydrogen over deuterium targets, $\sigma (p+p)/\sigma (p+d)$, is shown to be sensitive to this asymmetry. Predictions of various theoretical models for this ratio are presented.

latex file, ps file, 3 figures Uuencoded