$\pi^0$ 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, R.L. Workman, CLAS Collaboration
TL;DR
This paper reports precise measurements of the differential cross sections for $\
Contribution
It provides more accurate data for $\
Findings
Discrepancies with CB-ELSA at forward angles.
Agreement with SAID and MAID below 1 GeV.
Extended fits to 3 GeV and resonance analysis.
Abstract
Differential cross sections for the reaction 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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