Pion nucleon scattering and isospin violation

I discuss low-energy pion-nucleon scattering in the framework of chiral perturbation theory. I argue that using this theoretical method one is able to handle the in some cases tremendous experimental accuracy (for the low partial waves). I then show how strong and electromagnetic isospin violation can be treated simultaneously. Some first results for neutral pion scattering and the

\sigma

-term are given.

talk: Adelaide 1998/03/09
pi nucleon: elastic scattering
pi nucleon: charge exchange
isospin: violation
perturbation theory: chiral
pi nucleon: sigma term
partial wave analysis
pi nucleon: scattering length
Feynman graph
numerical calculations: interpretation of experiments

References(26)

Figures(0)

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