$π^0$ photoproduction on the proton for photon energies from 0.675 to 2.875 GeV

Details $π^0$ photoproduction on the proton for photon energies from 0.675 to 2.875 GeV $π^0$ photoproduction on the proton for photon energies from 0.675 to 2.875 GeV

2007-05-06

arxiv.org/abs/0705.0816v2

Phys.Rev.C76:025211,2007

Physics

High Energy Physics

High Energy Physics - Experiment

18 pages, 48 figures

Scientific paper

10.1103/PhysRevC.76.025211

Differential cross sections for the reaction $\gamma p \to p \pi^0$ have been measured with the CEBAF Large Acceptance Spectrometer (CLAS) and a tagged photon beam with energies from 0.675 to 2.875 GeV. The results reported here possess greater accuracy in the absolute normalization than previous measurements. They disagree with recent CB-ELSA measurements for the process at forward scattering angles. Agreement with the SAID and MAID fits is found below 1 GeV. The present set of cross sections has been incorporated into the SAID database, and exploratory fits have been extended to 3 GeV. Resonance couplings have been extracted and compared to previous determinations.

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