Test of low-energy theorems for p(\vec{gamma},π^{0})p in the threshold region
Preprint
- 17 May 2001
Abstract
The photon asymmetry in the reaction p(\vec{\gamma},\pi^{0})p close to threshold has been measured for the first time with the photon spectrometer TAPS using linearly polarized photons from the tagged-photon facility at the Mainz Microtron MAMI. The total and differential cross sections were also measured simultaneously with the photon asymmetry. This allowed determination of the S-wave and all three P-wave amplitudes. The low-energy theorems based on the parameter-free third-order calculations of heavy-baryon chiral perturbation theory for P1 and P2 agree with the experimental values.Keywords
All Related Versions
- Version 1, 2001-05-17, ArXiv
- Published version: Physical Review Letters, 87 (23), 232501.
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