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

Abstract : 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.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00169529
Contributor : Dominique Girod <>
Submitted on : Tuesday, September 4, 2007 - 11:48:44 AM
Last modification on : Wednesday, April 21, 2021 - 8:36:02 AM

Citation

M. Dugger, B. G. Ritchie, J. P. Ball, P. Collins, E. Pasyuk, et al.. $\pi^0$ photoproduction on the proton for photon energies from 0.675 to 2.875 GeV. Physical Review C, American Physical Society, 2007, 76, pp.025211. ⟨10.1103/PhysRevC.76.025211⟩. ⟨in2p3-00169529⟩

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