Looking for the gluonic EMC effect in associated $J/\ddot{I}ˆ$ + ${\hat{I}}^3$ production

Abstract

We study the associated production of $J/\ddot{I}ˆ+{\hat{I}}^3$ in fixed-target experiments with nuclear targets as well as at the relativistic heavy-ion collider (RHIC). We find that this process affords a very clean probe of $\ddot{I}{}_g$, the ratio of gluon density in a heavy nucleus to that of a proton. The combined $x$ range thus available can be used to discriminate between the predictions of different models of the EMC effect for $\ddot{I}{}_g$.

10 pages, 4 Figures (not included, available only by p-mail), LaTeX, CERN-TH.6679/92, TIFR/TH/92-59, BU-TH-92/3, Minor revision. Replaced version has the style file equation.sty appended for easy processing, which is the only change