In search of the ηc |
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Authors: | G Eilam B Margolis S Rudaz |
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Institution: | Physics Department, McGill University, Montreal, Canada |
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Abstract: | We argue that the X(2.88) detected in π?p → γγ + n at 40 GeV/c cannot be the ηc. We discuss the possibility that a qq?cc? state is produced there, probably the same state discovered in radiative decay of the J/ψ. Only at much higher energies is the ηc expected to dominate over qq?cc? in the π?p interaction. We also discuss coherent photoproduction and find that four quark state production would dominate over ηc. |
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