Abstract
In pure chiral perturbation theory (ChPT) the couplings of higher order Lagrangian terms are running parameters and hence can be determined only empirically from various low-energy hadronic processes. While this scenario works well for strong interactions, it is unsatisfactory for nonleptonic and radiative nonleptonic weak interactions: It is impossible, from the outset, to determine all unknown higher-order chiral couplings by experiment; theory is tested only by certain chiral constraints rather than by its quantitative predictions. Based on a QCD-motivated model for p 4 strong chiral Lagrangian valid in the limit of large N c, one can derive large-N c fourth-order effective chiral Lagrangians for ∆S = 1 nonleptonic weak interactions and radiative weak transitions. Applications to K →πππ, K →πγγ, and K→ππγ are discussed.
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Cheng, HY. (1994). Large-N c Higher Order Weak Chiral Lagrangians for Nonleptonic and Radiative Kaon Decays. In: Goeke, K., Hwang, WY.P., Speth, J. (eds) Contemporary Topics in Medium Energy Physics. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-9835-7_10
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DOI: https://doi.org/10.1007/978-1-4757-9835-7_10
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