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Charmonium resonance formation in $\gamma\gamma$ collisions with the L3 detector
Measurements of the two-photon partial widths of the charmonium mesons chi /sub c2/ and eta /sub c/ from data collected by the L3 detector are presented. The data comprises 140 pb/sup -1/ at square root (s) approximately=91 GeV and 52 pb/sup -1/ at square root (s) approximately=183 GeV. The Q/sup 2/...
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| Lenguaje: | eng |
| Publicado: |
2000
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| Acceso en línea: | https://dx.doi.org/10.1016/S0375-9474(99)00705-8 http://cds.cern.ch/record/443876 |
| Sumario: | Measurements of the two-photon partial widths of the charmonium mesons chi /sub c2/ and eta /sub c/ from data collected by the L3 detector are presented. The data comprises 140 pb/sup -1/ at square root (s) approximately=91 GeV and 52 pb/sup -1/ at square root (s) approximately=183 GeV. The Q/sup 2/ dependence of the eta /sub c/ cross section is studied for Q/sup 2/<9 GeV/sup 2/. A J/ psi pole form factor in the VMD model is found to describe the data better than a rho pole. (13 refs). |
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