Kl4 at two-loops and CHPT predictions for ππ-scattering
Gabriel Amoros, Johan Bijnens, Pere Talavera
Abstract
We present the results from our two-loop calculations of masses, decay-constants, vacuum-expectation-values and the K4 form-factors in three-flavour Chiral Perturbation Theory (CHPT). We use this to fit the Lir to two-loops and discuss the ensuing predictions for ππ-threshold parameters.
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