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Electromagnetism in nonleptonic weak interactions

AuthorsEcker, Gerhard; Isidori, Gino; Müller, G.; Neufeld, Helmut; Pich, Antonio
KeywordsChiral perturbation theory
Isospin violation
Nonleptonic weak interactions
Effective lagrangians
Issue Date18-Dec-2000
CitationNuclear Physics B 591(1-2): 419-434 (2000)
AbstractWe 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 ΔS=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→ππ decays.
Description16 páginas, 1 figura.-- PACS: 11.30.Rd; 13.25.Es; 13.40.Ks.-- arXiv:hep-ph/0006172v2
Publisher version (URL)http://dx.doi.org/10.1016/S0550-3213(00)00568-X
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