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Exclusive production of chi(c)(0(+)) meson and its measurement in the pi(+)pi(-) channel
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
2011 (English)In: Nuclear physics B, Proceedings supplements, ISSN 0920-5632, Vol. 219-220, 284-287 p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2011. Vol. 219-220, 284-287 p.
Keyword [en]
chi(c)(0(+)) -> pi(+)pi(-) decay, diffractive processes, two-pion continuum
National Category
Physical Sciences
URN: urn:nbn:se:uu:diva-173486DOI: 10.1016/j.nuclphysbps.2011.10.112ISI: 000301087400053OAI: oai:DiVA.org:uu-173486DiVA: diva2:523660
5th Joint International Hadron Structure Conference, JUN 27-JUL 01, 2011, Tatranska Strba, SLOVAKIA
Available from: 2012-04-25 Created: 2012-04-25 Last updated: 2012-04-25Bibliographically approved

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Pasechnik, Roman
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