A Parametrization for K^+to π^+π^- e^+ν

Gabriel Amoros (Lund , Helsinki) , Johan Bijnens (Lund)

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classification ✦ hep-ph

keywords parametrizationcheckchiraldiscussexperimentextractfactorsform

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We discuss various models and Chiral Perturbation Theory results for the $K_{l4}$ form factors $F$ and $G$. We check in how much a simple parametrization with a few parameters can be used to extract information from experiment.

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A Parametrization for K^+to π^+π^- e^+ν

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