Photoproduction of the omega meson on the proton at large momentum transfer.
The differential cross section, dsigma/dt, for omega meson exclusive photoproduction on the proton above the resonance region (2.6<W<2.9 GeV) was measured up to a momentum transfer -t=5 GeV2 using the CLAS detector at Jefferson Laboratory. The omega channel was identified by detecting a proton and pi(+) in the final state and using the missing mass technique. While the low momentum transfer region shows the typical diffractive pattern expected from Pomeron and Reggeon exchange, at large -t the differential cross section has a flat behavior. This feature can be explained by introducing quark interchange processes in addition to the QCD-inspired two-gluon exchange.
Battaglieri
M
M
Istituto Nazionale di Fisica Nucleare, Sezione di Genova and Dipartimento di Fisica, Università di Genova, Genova, Italy 16146.
Brunoldi
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Laget
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Taiuti
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Adams
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Armstrong
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Auger
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Barrow
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Beard
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Boiarinov
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Bouchigny
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Bradford
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Branford
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Brooks
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Capitani
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Carman
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Carnahan
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Cazes
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Cetina
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Cole
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Coleman
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Cords
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Corvisiero
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Crabb
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Crannell
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Cummings
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DeSanctis
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Demirchyan
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Denizli
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Dennis
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Dharmawardane
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Dytman
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Forest
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Gilad
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Guillo
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Kim
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Klimenko
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Kramer
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Kuhn
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Lawrence
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Lucas
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Major
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Marchand
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Mirazita
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Mueller
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Zhang
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