Charged radiative pion capture on the nucleon in heavy baryon chiral perturbation theory

Abstract

The differential cross sections and s-wave and p-wave multipoles for $\ddot{I}{€}^{-}p\to {\hat{I}}^{3}n$ and $\ddot{I}{€}^{+}n\to {\hat{I}}^{3}p$ have been calculated through $O(p^3)$ in heavy baryon chiral perturbation theory (HBChPT). Fits to existing data allow several of the low energy constants to be determined. Generally results of the calculation compare well with dispersion relation predictions.

3 pages, Latex, uses espcrc1.sty. Talk at the XVI International Conference on Few Body Problems in Physics (FB16),Taipei, Taiwan, March 6-10,2000