INVESTIGATION OF THE REACTIONS ALPHA-P-]TPP AND ALPHA-P-]TAU-PN INDUCED BY 2.7-GEV C ALPHA-PARTICLES/

The underlying mechanisms of the reactions alpha p --> tpp and alpha p --> tau pn are studied. Data from the ITEP two-meter bubble chamber f illed with liquid hydrogen and irradiated by a 2.7-GeV/c separated a-p article beam are analyzed. The total cross sections for the two reacti ons are estimated at 20.7 +/- 0.4 and 34.4 +/- 0.4 mb, respectively. T he phase-space domains in which quasifree scattering and final-state i nteractions play leading roles are isolated. The angular, momentum, an d invariant-mass distributions of secondary particles are obtained ove r the entire allowed kinematic range. In the region of quasifree scatt ering, the data are compared with the pole-model predictions.