Measurement of exclusive production of scalar Χ_c0 meson in proton-(anti)proton collisions via π_c0→π⁺π^- decay

Summary, in English

We consider a measurement of exclusive production of scalar Χc(0⁺⁺) meson in the proton-proton collisions at LHC and RHIC and in the proton-antiproton collisions at the Tevatron via Χ_c0→π⁺π^- decay. The corresponding amplitude for exclusive double-diffractive Χ_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 pp→ppπ⁺π^- reaction constitutes an irreducible background to the exclusive Χ_c0 meson production. We include absorption effects due to proton-proton interaction and pion-pion rescattering. We calculate several differential distributions for pp(p)→pp(p)Χ_c0 process including the absorptive corrections. The influence of kinematical cuts on the signal-to-background ratio is investigated. Corresponding experimental consequences are discussed.

• Author: P. Lebiedowicz; R. Pasechnik; A. Szczurek
• Department/s: Department of Astronomy and Theoretical Physics - Has been reorganised
• Publishing year: 2011-07-18
• Language: English
• Pages: 434-444
• Publication/Series: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics
• Volume: 701
• Issue: 4
• Links: http://dx.doi.org/10.1016/j.physletb.2011.06.017
• Document type: Journal article
• Publisher: Elsevier
• Keywords: Χ(0)→ππ decay; Diffractive processes; Two-pion continuum
• Status: Published
• ISBN/ISSN/Other: ISSN: 0370-2693