Strange Particle Production in Three and Four-Body Final States of 16-GeV/c pi+- p Reactions

The AACHEN-BERLIN-BONN-CERN-CRACOW collaboration Bosetti, P. ; Grassler, H. ; Otter, G. ; et al.
Nucl.Phys.B 128 (1977) 205-218, 1977.
Inspire Record 126061 DOI 10.17182/hepdata.35256

Three- and four-body final states with strange particles are studied in π + p and π − p interactions at 16 GeV/ c . We present cross sections and investigate their energy dependence. Production mechanism, resonance production and quantum number transfer are discussed. Strong Y ∗ (1385) production is found in the reaction π + p → Λ K + π + , while the corresponding π − p reaction is dominated by production of K ∗ (890). In the NK K π channels, the K and K are produced mainly at the same vertex, i.e. non-strangeness exchange ΔS = 0 is dominant (about 75% of the cases), whereas in the Λ K ππ channels, the Λ and K are more frequently produced at opposite vertices, i.e. | ΔS | = 1 exchange is important (about 60% of the cases). Results on the polarization of the lambdas produced in the π + p reactions are given.

1 data table

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