Antiproton-proton annihilation into π+π− and K +K − at 6.2 GeV/ c

Abstract

The angular distributions for the two annihilation channels p ̄ p →π +π − and p ̄ p → K +K − have been measured at 6.2 GeV/ c. The two-pion channel shows peripheral peaks for π + and π − going forward, and the two-kaon channel shows a peripheral peak for the K − going forward. The results have been compared with the line-reversed elastic backward scattering reactions and also with a constituent interchange model.