Beam asymmetry in near threshold omega photoproduction off the proton

Details Beam asymmetry in near threshold omega photoproduction off the proton Beam asymmetry in near threshold omega photoproduction off the proton

2008-07-03

arxiv.org/abs/0807.0594v1

Phys.Rev.D78:117101,2008

Physics

High Energy Physics

High Energy Physics - Experiment

4 pages, 5 figures

Scientific paper

10.1103/PhysRevD.78.117101

The photoproduction of omega mesons off protons has been studied at the Bonn ELSA accelerator from threshold to E_gamma = 1700 MeV. Linearly polarized beams were produced via coherent bremsstrahlung. Large photon asymmtries in excess of 50% were obtained, whereas the pion asymmetries from omega \to pi^0 gamma are close to zero. The asymmetries do characteristically depend on Theta_{cm} rather than |t| and indicate s-channel resonance formation on top of t-channel exchange processes.

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