Production of Chi_c2 Mesons in Photon-Photon Collisions at LEP

Details Production of Chi_c2 Mesons in Photon-Photon Collisions at LEP Production of Chi_c2 Mesons in Photon-Photon Collisions at LEP

1998-08-24

arxiv.org/abs/hep-ex/9808025v1

Phys.Lett.B439:197-208,1998

Physics

High Energy Physics

High Energy Physics - Experiment

18 pages, LaTeX, 6 eps figures included, submitted to Physics Letters B

Scientific paper

10.1016/S0370-2693(98)01128-9

We present an observation at LEP of the production of chi_c2 mesons in the collisions of two quasi-real photons using the OPAL detector. The chi_c2 mesons are reconstructed in the decay channel Chi_c2 to J/psi gamma to l+l- gamma (with l= e,mu) using all data taken at e+e- centre-of-mass energies of 91 and 183 GeV, corresponding to integrated luminosities of 167 and 55 pb-1 respectively. The two-photon width of the Chi_2 is determined to be 1.76 +- 0.47 +- 0.37 +- 0.15 keV where the first error is statistical, the second is systematic and the third comes from branching ratio uncertainties.

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