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Electromagnetism in nonleptonic weak interactions

G. Ecker·G. Isidori·G. Mueller·H. Neufeld·A. Pich
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Abstract

We construct a low-energy effective field theory that permits the complete treatment of isospin-breaking effects in nonleptonic weak interactions to next-to-leading order. To this end, we enlarge the chiral Lagrangian describing strong and Delta S=1 weak interactions by including electromagnetic terms with the photon as additional dynamical degree of freedom. The complete and minimal list of local terms at next-to-leading order is given. We perform the one-loop renormalization at the level of the generating functional and specialize to K -> pi pi decays.

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G. Ecker, G. Isidori, G. Mueller, H. Neufeld, A. Pich. 2000-10-10. Electromagnetism in nonleptonic weak interactions. https://doi.org/10.1016/s0550-3213(00)00568-x

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