Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-03-29
Phys.Lett.B701:434-444,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
16 pages, 10 figures, 2 tables
Scientific paper
10.1016/j.physletb.2011.06.017
We consider a measurement of exclusive production of scalar $\chi_{c}(0^{++})$ meson in the proton-proton collisions at LHC and RHIC and in the proton-antiproton collisions at the Tevatron via $\chi_{c0} \to \pi^{+}\pi^{-}$ decay. The corresponding amplitude for exclusive double-diffractive $\chi_{c0}$ meson production was obtained within the $k_{t}$-factorization approach including virtualities of active gluons and the corresponding cross section is calculated with unintegrated gluon distribution functions (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 distributions for $pp(\bar{p}) \to pp(\bar{p})\chi_{c0}$ process including absorptive corrections. The influence of kinematical cuts on the signal-to-background ratio is investigated. Corresponding experimental consequences are discussed.
Lebiedowicz Piotr
Pasechnik Roman
Szczurek Antoni
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