## Central exclusive production of the scalar {chi}{sub c} meson at the Fermilab Tevatron, BNL RHIC, and CERN LHC energies

We calculate several differential distributions for exclusive double-diffractive {chi}{sub c}(0{sup ++}) production in the proton-antiproton collisions at the Tevatron and in proton-proton collisions at RHIC and LHC. We use unintegrated gluon distributions (UGDFs) within the k{sub t}-factorization approach. The g*g*{yields}{chi}{sub c}(0{sup ++}) transition vertex is calculated as a function of gluon virtualities via the standard perturbative nonrelativistic QCD technique. The off shell effects are discussed and quantified. They lead to a reduction of the cross section by a factor of 2-5, depending on the position in the phase space and UGDFs. Different models of UGDFs are used and the resultsmore »