The Kl3 scalar form factors in the standard model

Abstract

We discuss the predictions of the standard model for the scalar form factors of Kl3 decays. Our analysis is based on the results of chiral perturbation theory, large Nc estimates of low-energy couplings and dispersive methods. It includes a discussion of isospin violating effects of strong and electromagnetic origin.

14 pages, presentation improved, several remarks and references added, results unchanged, to be published in EPJC

References in corpus (5)

• An improved calculation of the isospin-symmetry-breaking corrections to superallowed Fermi beta decay
• The Standard Model prediction for R_{e/mu}^{(pi,K)}
• $\eta \to 3\pi$ at Two Loops In Chiral Perturbation Theory
• pi/K -> e nu branching ratios to O(e^2 p^4) in Chiral Perturbation Theory
• Matching Chiral Perturbation Theory and the Dispersive Representation of the Scalar Kpi Form Factor

Cited by in corpus (3)

• Dispersive representation and shape of the Kl3 form factors: robustness
• Reanalysis of pion pion phase shifts from K -> pi pi decays
• Improved bounds on the radius and curvature of the K pi scalar form factor and implications to low-energy theorems