Double-strangeness production in Λ p →K+X reaction

We investigate S =-2 production from the Λ p →K⁺X reactions within the effective Lagrangian approach. The Λ p →K⁺Λ Λ and Λ p →K⁺Ξ^-p reactions are considered to find the lightest S =-2 system, which is H -dibaryon. We assume that the H (2250 )→Λ Λ , and H (2270 )→Ξ^-p decays with the intrinsic decay width of 1 MeV. According to our calculations, the total cross sections for Λ p →K⁺Λ Λ and Λ p →K⁺Ξ^-p reactions were found to be of the order of a few μ b in the Λ beam momentum range of up to 5 GeV /c . Furthermore, the direct access of information regarding the interference patterns between the H -dibaryon and nonresonant contributions was demonstrated.