A STUDY OF LARGE TRANSVERSE ENERGY EVENTS IN PION-PROTON AND PROTON-PROTON INTERACTIONS AT P(LAB) = 200 GEV/C AND EVIDENCE FOR HIGHER-TWIST EFFECTS (E609, EXPERIMENT, FERMILAB, JETS, DIRECT COUPLING)

[摘要] A full azimuth large-acceptance segmented calorimeter ((THETA)(,cm) ranging from 20(DEGREES) to 110(DEGREES)) and a beam calorimeter (covering a range (THETA)(,cm) < 20(DEGREES)) were used to study the production of large transverse energy events from (pi)('+)p, (pi)('-)p and pp interactions at 200 GeV. The (pi)p induced dijets were found, in agreement with earlier experiments, to deposit more energy in the forward direction and were more copiously produced at large E(,t) than the pp induced dijets. No dominant two-jet structure was found in the globally triggered data. Evidence has also been found for pion induced dijets with little or no forward energy flow. The rate and characteristics of these events are compatible with the predictions of Berger and Brodsky for higher-twist processes. No corresponding signal was seen in pp collisions.

[发布机构] Rice University

[效力级别] physics