Measurement of the Beam Asymmetry $Σ$ in the Forward Direction for pi0 Photoproduction

Details Measurement of the Beam Asymmetry $Σ$ in the Forward Direction for pi0 Photoproduction Measurement of the Beam Asymmetry $Σ$ in the Forward Direction for pi0 Photoproduction

2010-03-06

arxiv.org/abs/1003.1346v3

Phys. Rev. C 81, 065210 (2010)

Physics

Nuclear Physics

Nuclear Experiment

11 pages, 10 figures, published in Phys. Rev. C, included LEPS data and MAID 2007 predictions for comparison with our data

Scientific paper

10.1103/PhysRevC.81.065210

Photoproduction of neutral pions has been studied with the CBELSA/TAPS detector for photon energies between 0.92 and 1.68~GeV at the electron accelerator ELSA. The beam asymmetry~$\Sigma$ has been extracted for $115^\circ < \theta_{\rm c.m.} < 155^\circ$ of the $\pi^0$~meson and for $\theta_{\rm c.m.} < 60^\circ$. The new beam asymmetry data improve the world database for photon energies above 1.5~GeV and, by covering the very forward region, extend previously published data for the same reaction by our collaboration. The angular dependence of $\Sigma$ shows overall good agreement with the SAID parameterization.

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