Photoproduction of π0 on Protons by Polarized γ Rays
Abstract
The asymmetry Σ(k,θ*)=(dσ⊥- dσ∥)(dσ⊥+σ∥) of the polarized cross sections for π0 photoproduction has been measured at θ*=90° for energies k of the incident photon in the range 230-380 MeV. The experiment has been performed with the polarized γ-ray beam of the Frascati 1-GeV electron synchrotron. The experimental results are compared with the present theoretical predictions in order to investigate the importance of ω exchange in the t channel and the contribution of the E1+(3) multipole at the 33 resonance. The theory with ω exchange is in the best agreement with the experiment.
- Publication:
-
Physical Review
- Pub Date:
- August 1969
- DOI:
- 10.1103/PhysRev.184.1402
- Bibcode:
- 1969PhRv..184.1402B