Studies of proton-proton collisions at the CERN ISR with an identified charged hadron of high transverse momentum at 90$^0$ ; 1, on forward particles in high-p$_{T}$ reactions

In the course of an experiment to investigate the structure of final states from high-energy proton-proton collisions containing an identified charged hadron of high transverse momentum near 90 degrees in the c.m.s., correlations between the high-P/sub T/ trigger particle and forward charged particles were studied. An azimuthal asymmetry is observed for the forward particles. A transverse momentum recoil against the trigger particle is seen, largest at large Feynman x and apparently saturating with increasing trigger momentum. A flatter P /sub T/ spectrum is observed for the associated forward particles of 90 degrees in azimuth to the trigger than in normal events. The dependence of the correlations on the quantum numbers of the trigger particle is generally small in this region of phase space. (24 refs).