Some three-body final states in K −p reactions at 14.3 GeV/c

Abstract

We present experimental results on a number of K −p reactions at 14.3 GeV/ c that have three bodies in the final state. The final states are K −ω p, K −π p, Λπ +π −, Λ K + K −, Λp p, K ∗ −ω p, Λ(1520) K + K − and Λ(1520) p p . Whenever, with one exception explained by the Zweig rule, there is a K − or a proton in the final state, there is a diffractive-like threshold enhancement in the mass spectrum of the two recoiling particles. These enhancements account for a large fraction of the events in all but the Λπ + π − final state, where they cannot occur, and which is dominated by resonance production. We find evidence for the Q 1(1300) decaying into K − ω.