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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
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- 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
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ID | Quantity | Beam | Target | Final state |
Q2min, GeV2 |
Q2max, GeV2 |
Wmin, GeV |
Wmax, GeV |
---|---|---|---|---|---|---|---|---|
E72M1 | dσ/dt | γ | p | ω p | 0.0 | 0.0 | 2.624 | 2.688 |
E72M2 | dσ/dt | γ | p | ω p | 0.0 | 0.0 | 2.688 | 2.75 |
E72M3 | dσ/dt | γ | p | ω p | 0.0 | 0.0 | 2.75 | 2.81 |
E72M4 | dσ/dt | γ | p | ω p | 0.0 | 0.0 | 2.81 | 2.87 |
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