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- Lebiedowicz, P., et al.
(författare)
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Exclusive production of chi(c)(0(+)) meson and its measurement in the pi(+)pi(-) channel
- 2011
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Ingår i: Nuclear physics B, Proceedings supplements. - : Elsevier BV. - 0920-5632 .- 1873-3832. ; 219-220, s. 284-287
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Tidskriftsartikel (refereegranskat)abstract
- We report on the results of a theoretical study of the central exclusive production of scalar chi(c)(0(+)) meson via chi(c0) -> pi(+)pi(-) decay in high-energy hadron collisions at the RHIC, Tevatron and LHC. 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 cross section is calculated with unintegrated gluon distribution functions (UGDFs) known from the literature. The four-body pp -> pp pi(+)pi(-) reaction constitutes an irreducible background to the exclusive chi(c0) meson production. We include the absorption effects due to proton-proton interaction and pion-pion rescattering. Several differential distributions for pp((p) over bar) -> pp((p) over bar)chi(c0) process, including the absorptive corrections, were calculated. The influence of kinematical cuts on the signal-to-background ratio is investigated.
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