Applied Chiral Perturbation Theory
Ulf-G. Meißner
Abstract
I consider some selected topics in chiral perturbation theory (CHPT) as probed at colliders such as DAΦNE. Emphasis is put on processes involving pions in the isospin zero S-wave which require multi-loop calculations. These include the scalar form factor of the pion, two--photon fusion into pion pairs and K 4--decays. The physics of the chiral anomaly is briefly touched upon
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