Study of events with a positive particle of large transverse momentum emitted near the forward direction in pp collisions at √s = 52.5 GeV

Abstract The split field magnet facility of the CERN ISR has been used to measure events with a secondary particle of large transverse momentum. The selection was done by triggering on positive particles of p T > 1.5 GeV/ c emitted near the forward direction. Inclusive distributions of the other charged secondaries have been studied over almost the full kinematical range as a function of their y , p T , o and charge. The particle density shows a broad increase in the o hemisphere opposite to the selected large p T particle. This increase occurs in a wide rapidity interval centered at y = 0, although the trigger is at y = 2.