Exclusive Charmonium and χc Production

Document(s) Web Page       Phys. Rev. Lett. 102, 242001 (2009)
Contact(s) L. Zhang, M. Albrow, J. Pinfold
Abstract We present a measurement of the cross sections of (1) QED dimuon production mediated by 2-photon exchange, (2) J/ψ and ψ' photoproduction mediated by photon-pomeron exchangeand, and (3) χc production mediated by pomeron-pomeron exchangeand. The three processes share same final state of a muon pair and nothing else observabale in the detector, except χc events which contain an additional soft photon.
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