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Spokesperson

M. Battaglieri

Abstract

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.

Publication

1. M. Battaglieri, M. Brunoldi, R. De Vita, J. M. Laget, M. Osipenko, M. Ripani, M. Taiuti, and CLAS Collaboration Photoproduction of the Omega Meson on the Proton at Large Momentum Transfer // Phys.Rev.Let.90,022002(2003)

Quantities

dσ/dt

Measurements