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arXiv · hep-ph/9912398

Low Energy Constants from Kl4 Form-Factors

G. Amorós·J. Bijnens·P. Talavera
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Abstract

We have calculated the form-factors F and G in K ---> pi pi e nu decays (Kl4) to two-loop order in Chiral Perturbation Theory (ChPT). Combining this together with earlier two-loop calculations an updated set of values for the L's, the ChPT constants at p^4, is obtained. We discuss the uncertainties in the determination and the changes compared to previous estimates.

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G. Amorós, J. Bijnens, P. Talavera. 2000-02-29. Low Energy Constants from Kl4 Form-Factors. https://doi.org/10.1016/s0370-2693(00)00384-1

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