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Photoproduction of the $ω$ meson on the proton at large momentum transfer

M. Battaglieri·M. Brunoldi·R. De Vita·J. M. Laget·M. Osipenko·M. Ripani·M. Taiuti
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Abstract

The differential cross section, $dσ/dt$ for $ω$ meson exclusive photoproduction on the proton above the resonance region ($2.6<W<2.9$ GeV) was measured up to a momentum transfer $-t = 5$ GeV$^2$ using the CLAS detector at Jefferson Laboratory. The $ω$ channel was identified by detecting a proton and $π^+$ 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.

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M. Battaglieri, M. Brunoldi, R. De Vita, J. M. Laget, M. Osipenko, M. Ripani, M. Taiuti. 2002-12-04. Photoproduction of the $ω$ meson on the proton at large momentum transfer. https://doi.org/10.1103/physrevlett.90.022002

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