Low Energy Constants from Kl4 Form-Factors

Details Low Energy Constants from Kl4 Form-Factors Low Energy Constants from Kl4 Form-Factors

1999-12-17

arxiv.org/abs/hep-ph/9912398v2

Phys.Lett. B480 (2000) 71-76

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, uses axodraw.sty, 2 figures, bug in program corrected, new numerical results

Scientific paper

10.1016/S0370-2693(00)00384-1

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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