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Roman Pasechnik

Senior lecturer

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Exclusive production of χ c(0 +) meson and its measurement in the π +π - channel

Author

  • P. Lebiedowicz
  • R. Pasechnik
  • A. Szczurek

Summary, in English

We report on the results of a theoretical study of the central exclusive production of scalar χ c(0 +) meson via χ c0→π +π - decay in high-energy hadron collisions at the RHIC, Tevatron and LHC. 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 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 the absorption effects due to proton-proton interaction and pion-pion rescattering. Several differential distributions for pp(p̄)→pp(p̄)χc0 process, including the absorptive corrections, were calculated. The influence of kinematical cuts on the signal-to-background ratio is investigated.

Department/s

  • Department of Astronomy and Theoretical Physics

Publishing year

2011-10

Language

English

Pages

284-287

Publication/Series

Nuclear Physics B - Proceedings Supplements

Volume

219-220

Document type

Journal article

Publisher

Elsevier

Keywords

  • χ (0 )→π π decay
  • Diffractive processes
  • Two-pion continuum

Status

Published

ISBN/ISSN/Other

  • ISSN: 0920-5632