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We discuss the results of exclusive $p p \to p p K^{+} K^{-}$ reaction athigh energies which constitutes an irreducible background to three-bodyprocesses $p p \to p p M$, where $M=\phi$, $f_{2}(1275)$, $f_{0}(1500)$,$f_{2}'(1525)$, $\chi_{c0}$. We consider central diffractive contributionmediated by Pomeron and Reggeon exchanges including absorption effects due toproton-proton interaction and kaon-kaon rescattering. We make predictions forfuture experiments at RHIC, Tevatron and LHC. Differential distributions ininvariant two-kaon mass, kaon rapidities and transverse momenta of kaons arepresented. We discuss a measurement of exclusive production of scalar$\chi_{c0}$ meson in the proton-(anti)proton collisions via $\chi_{c0} \toK^{+}K^{-}$ decay. The corresponding amplitude for exclusive centraldiffractive $\chi_{c0}$ meson production is calculated within the$k_{t}$-factorization approach.

Exclusive open strangeness production in the $pp \to pp K^{+} K^{-}$ reaction at high energies and a measurement of scalar $\chi_{c0}$ meson