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We consider a measurement of exclusive production of scalar$\chi_{c}(0^{++})$ meson in the proton-proton collisions at LHC and RHIC and inthe proton-antiproton collisions at the Tevatron via $\chi_{c0} \to\pi^{+}\pi^{-}$ decay. The corresponding amplitude for exclusivedouble-diffractive $\chi_{c0}$ meson production was obtained within the$k_{t}$-factorization approach including virtualities of active gluons and thecorresponding cross section is calculated with unintegrated gluon distributionfunctions (UGDFs) known from the literature. The four-body $p p \to p p \pi^+\pi^-$ reaction constitutes an irreducible background to the exclusive$\chi_{c0}$ meson production. We calculate several differential distributionsfor $pp(\bar{p}) \to pp(\bar{p})\chi_{c0}$ process including absorptivecorrections. The influence of kinematical cuts on the signal-to-backgroundratio is investigated. Corresponding experimental consequences are discussed.

Measurement of exclusive production of scalar $\chi_{c0}$ meson in proton-(anti)proton collisions via $\chi_{c0} \to \pi^{+}\pi^{-}$ decay