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    Electroproduction of ømega(783) Mesons Using CLAS at Jefferson Lab.

    Session OB12 - Photoproduction and Electroproduction of Mesons.
    ORAL session, Wednesday morning, March 24
    Room 219E, GWCC

    A. Coleman, H. Funsten (College of William and Mary, for the CLAS COLLABORATION)

    Electroproduction of ømega(783) mesons from a proton target has been measured in a search for so called "missing baryon resonances". A 4 GeV electron beam was used. The scattered electrons were measured in coincidence with the recoiling proton and the \pi^+ from the ømega decay. Missing mass techniques were applied to identify the ømega in the final state, and to reduce the \rho (770) contribution. The data show the ømega very clearly on a smooth background originating predominantly from 3-pion phase space. Differential cross sections have been extracted, and the W and t dependencies will be presented. The t dependence is mostly monotonic for W > 2 GeV, as expected from pi-exchange and diffractive processes, while for W < 2 GeV strongly non-monotonic behavior is observed, indicative of possible s-channel nucleon resonance contributions (Work supported in part by the NSF under grant PHY-9704502.).

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