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Measurement of exclusive production of scalar chi(c0) meson in proton-(anti)proton collisions via chi(c0) -> pi(+)pi(-) decay
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
2011 (English)In: Physics Letters B, ISSN 0370-2693, Vol. 701, no 4, 434-444 p.Article in journal (Refereed) Published
Abstract [en]

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) -> 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 pp -> pp pi(+)pi(-) reaction constitutes an irreducible background to the exclusive chi(c0) meson production. We include absorption effects due to proton-proton interaction and pion-pion rescattering. We calculate several differential distributions for pp((p) over bar) -> pp((p) over bar)chi(c0) process including the absorptive corrections. The influence of kinematical cuts on the signal-to-background ratio is investigated. Corresponding experimental consequences are discussed.

Place, publisher, year, edition, pages
2011. Vol. 701, no 4, 434-444 p.
Keyword [en]
chi(c)(0(+)) -> pi(+)pi(-) decay, Diffractive processes, Two-pion continuum
National Category
Physical Sciences
URN: urn:nbn:se:uu:diva-156955DOI: 10.1016/j.physletb.2011.06.017ISI: 000292994100009OAI: oai:DiVA.org:uu-156955DiVA: diva2:435831
Available from: 2011-08-20 Created: 2011-08-11 Last updated: 2011-08-20Bibliographically approved

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