Hyperon-nucleon interactions in the pp ->, K+ Lambda p reaction

We present calculations of the invariant mass spectra of the hp system for the exclusive pp --> K+ Lambdap reaction with the aim of studying the final state interaction between the Lambda -hyperon and the proton. The reaction is described within a meson exchange framework and the final state Lambdap interaction is incorporated through an off-shell t-matrix for the Lambdap --> Lambdap scattering, constructed using the available hyperon-nucleon (YN ) potentials. The cross sections are found to be sensitive to the type of Y N potential used especially at the Lambda and Sigma production thresholds. Hence, data on this exclusive reaction, which can be used to constrain the YN potentials are desirable.