Diffraction dissociation in the reaction p+p→Λ°+K++p at the CERN ISR

Abstract The exclusive reaction pp→ Λ °K + p has been studied at 0.1 t pp 2 and energies √s=45 GeV and 53 GeV at the CERN ISR. Diffractive excitation p→ Λ °K + occurs predominantly in the mass range M ( Λ °K + )≈2.1 GeV and peaks at 1.7 GeV. The cross section for pp→ Λ °K + p is 10±3 μ b for M ( Λ °K + ) t pp dependence is exp ( bt ) with b =7.0±0.5 GeV −2 .