Low Energy Constants from Kl4 Form-Factors

Preprint

17 December 1999

preprint
Published by arXiv in arXiv

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.

Keywords

PERTURBATION THEORY
ENERGY CONSTANTS
UNCERTAINTIES
FORM FACTORS
TWO LOOP
KL4 FORM
CHIRAL
DECAYS
CHPT

All Related Versions

Version 1, 1999-12-17, ArXiv
Version 2, 2000-02-29, ArXiv
Published version: Physics Letters B, 480 (1-2), 71.

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