Exclusive production of χ_{c}(0^{+}) meson and its measurement in the π^{+}π^{-} channel

Abstract

We report on the results of a theoretical study of the central exclusive production of scalar ${\chi }_c(0^{+})$ meson via ${\chi }_{c0}\to {\pi }^{+}{\pi }^{-}$ 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 $pp\to pp{\pi }^{+}{\pi }^{-}$ 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 $pp(\bar{p})\to pp(\bar{p}){\chi }_{c0}$ process, including the absorptive corrections, were calculated. The influence of kinematical cuts on the signal-to-background ratio is investigated.

4 pages, 6 figures, talk by P.Lebiedowicz at the 5th International Hadron Structure'11 Conference, Tatranská Štrba, Slovakia, June 27th - July 1st, 2011

References in corpus (12)

• Central Exclusive Particle Production at High Energy Hadron Colliders
• Observation of exclusive charmonium production and gamma+gamma to mu+mu- in p+pbar collisions at sqrt{s} = 1.96 TeV
• On the role of heavy flavor parton distributions at high energy colliders
• Central exclusive chi_c meson production at the Tevatron revisited
• Exclusive $pp\to pp{\pi }^{+}{\pi }^{-}$ reaction: from the threshold to LHC
• Central exclusive production of scalar χ_c meson at the Tevatron, RHIC and LHC energies
• Elastic double diffractive production of axial-vector χ_c(1^{++}) mesons and the Landau-Yang theorem
• Nonperturbative and spin effects in the central exclusive production of tensor ${\chi }_c(2^{+})$ meson
• Measurement of exclusive production of scalar ${\chi }_{c0}$ meson in proton-(anti)proton collisions via ${\chi }_{c0}\to {\pi }^{+}{\pi }^{-}$ decay
• Exclusive scalar $f_0(1500)$ meson production for energy ranges available at the GSI Facility for Antiproton and Ion Research (GSI-FAIR) and at the Japan Proton Accelerator Research Complex (J-PARC)
• Central exclusive quarkonium production with tagged forward protons at RHIC
• Exclusive $pp\to nn{\pi }^{+}{\pi }^{+}$ reaction at LHC and RHIC

Cited by in corpus (2)

• Measurement of central exclusive pi+pi- production in p-pbar collisions at sqrt(s) = 0.9 and 1.96 TeV at CDF
• Revision of absorption corrections for the $pp\to pp{\pi }^{+}{\pi }^{-}$ process