Photoproduction of meson pairs: First measurement of the polarization observable I^s

Details Photoproduction of meson pairs: First measurement of the polarization observable I^s Photoproduction of meson pairs: First measurement of the polarization observable I^s

2009-12-14

arxiv.org/abs/0912.2632v2

Phys.Lett.B687:11-15,2010

Physics

Nuclear Physics

Nuclear Experiment

11 pages, 6 figures, v2 to appear in Phys. Lett. B

Scientific paper

10.1016/j.physletb.2010.02.076

The polarization observable I^s, a feature exclusive to the acoplanar kinematics of multi-meson final states produced via linearly polarized photons, has been measured for the first time. Results for the reaction g p -> p pi0 eta are presented for incoming photon energies between 970 MeV and 1650 MeV along with the beam asymmetry I^c. The comparably large asymmetries demonstrate a high sensitivity of I^s to the dynamics of the reaction. Fits using Bonn-Gatchina partial wave analysis demonstrate that the new polarization observables carry significant information on the contributing partial waves.

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