Small Angle Jyc Production in pp Collisions at p s 5 1.8 TeV

yctransverse momenta and large rapidities. We compare ourresults with theoretical predictions extended into this kine-matic domain.The D0 detector [8] consists of three main systems: cen-tral and forward drift chambers, used to identify chargedtracks for pseudorapidity jhj # 3.2; the uranium-liquid ar-gon calorimeter with nearly hermetic coverage for jhj #4; and the muon system. The detector component mostrelevant to this analysis is the small angle muon spectro-meter (SAMUS) [9,10] consisting of magnetized irontoroids and drift tube stations on each side of the interactionregion with pseudorapidity coverage of 2.2 , jh