Abstract
We report measurements of charmonia produced in two-photon collisions and decaying to four-meson final states, where the meson is either a charged pion or a charged kaon. The analysis is based on a 395 fb-1 data sample accumulated with the Belle detector at the KEKB electron–positron collider. We observe signals for the three C-even charmonia ηc(1S), χc0(1P) and χc2(1P) in the π+π-π+π-, K+K-π+π- and K+K-K+K- decay modes. No clear signals for ηc(2S) production are found in these decay modes. We have also studied resonant structures in charmonium decays to two-body intermediate meson resonances. We report the products of the two-photon decay width and the branching fractions, \(\Gamma_{\gamma\gamma}\mathcal{B}\), for each of the charmonium decay modes.
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13.25.Gv; 13.66.Bc; 14.40.Gx
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Uehara, S., Adachi, I., Aihara, H. et al. Study of charmonia in four-meson final states produced in two-photon collisions. Eur. Phys. J. C 53, 1–14 (2008). https://doi.org/10.1140/epjc/s10052-007-0451-z
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DOI: https://doi.org/10.1140/epjc/s10052-007-0451-z