Correlations in high transverse momentum final states

The author reviews experiments and results in the study of particle correlations in high energy collisions leading to high transverse momentum secondaries. Most of the effects observed in opposite direction with respect to that of a high p/sub perpendicular to / hadron, can be largely explained in terms of kinematic effects. These effects have made any search for jets of hadrons opposite to a high p /sub perpendicular to / hadron inconclusive-on the other hand, the positive momentum correlations observed between two high p/sub perpendicular to / hadrons in the same azimuthal region, are certainly of dynamical origin and must be studied further. (9 refs).