2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/228159Two coupled channel effects connected with kaon pair production in proton-proton collisions are discussed. (1) Although there is ample evidence that the antikaon is strongly attracted to the recoil protons in pp -> K+pK-p, residual effects of the K+K- interaction are seen, including a possible cusp at the K0\bar{K}0 threshold. This is investigated within a simple K-matrix approach. (2) The production rates and invariant mass distributions for pp -> K+p{K-p} and pp -> K+p{pi0 Sigma0} are related using a separable potential description of the coupled K-p/pi0 Sigma0 channels. It can be plausibly argued that this pair of reactions is driven through the production of the Lambda(1405).8 pages, Presented at the Symposium on Meson Physics, Cracow October 2008, to be published in Acta Physica PolonicaNuclear Theorytext