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

B.G. Ritchie; CLAS Collaboration; E. Pasyuk; I.I. Strakovsky; J.P. Ball; M. Dugger; P. Collins; R.A. Arndt; R.L. Workman; W.J. Briscoe

arxiv: 0705.0816 · v2 · submitted 2007-05-06 · ✦ hep-ex

π⁰ photoproduction on the proton for photon energies from 0.675 to 2.875 GeV

M. Dugger , B.G. Ritchie , J.P. Ball , P. Collins , E. Pasyuk , R.A. Arndt , W.J. Briscoe , I.I. Strakovsky

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R.L. Workman CLAS Collaboration

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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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π⁰ photoproduction on the proton for photon energies from 0.675 to 2.875 GeV

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