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Physics  1997 

Chiral Perturbation Theory and Nuclear Physics

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Chiral symmetry serves as a guiding principle in low-energy hadron dynamics. An effective lagrangian, which explicitly breaks chiral symmetry via a small mass term, allows for a systematic method of calculating higher order corrections to tree-level results. This is applied to radiative muon capture on hydrogen, %to extract the weak pseudoscalar form factor, and to proton-proton $\pi^0$ production near threshold. Both processes pose theoretical challenges in light of recent experimental results.


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