2013

Isospin Breaking Effects in $K_{\ell4}$ Decays

Stoffer, Peter

Understand

In the framework of chiral perturbation theory with photons and leptons, the one-loop isospin breaking effects in $K_{\ell4}$ decays due to both the photonic contribution and the quark and meson mass differences are computed.

A comparison with the isospin breaking corrections applied by recent high statistics $K_{e4}$ experiments is performed.
The calculation can be used to correct the existing form factor measurements by isospin breaking effects that have not yet been taken into account in the experimental analysis.
Based on the present work, possible forthcoming experiments on $K_{e4}$ decays could correct the isospin breaking effects in a more consistent way.

Built on

Etude expérimentale à haute statistique de la désintégration du méson K + K^{+} dans le mode K e 4 K_{e4} , et analyse des paramètres qui gouvernent cette désintégration
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