Antiproton proton annihilations at 1.6–2.2 GeV/c into final states with a K1o meson

Abstract

Antiproton proton annihilations into final states containing at least one K l meson have been studied in a 150 000 picture bubble chamber experiment. The experiment covered six'incident antiproton momenta in the range 1.6-2.2 GeV/c. Cross sections at each incident momentum are determined for the more abundantly produced final states, and momentum averaged cross sections are determined for some rarer final states, including O~ O,*O-+. .. . K K and K K K K. Coplous resonance production, Includlng double resonance production, is observed, and percentage contributions of different resonance channels are evaluated. Cross sections and resonance fractions are compared with results of other experiments at antiproton momenta in the range 0.7-3.7 GeV/c.