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

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• Towards a consistent estimate of the chiral low-energy constants
• The Standard Model prediction for R_{e/mu}^{(pi,K)}
• $\eta \to 3\pi$ at Two Loops In Chiral Perturbation Theory
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Cited by in corpus (9)

• Phenomenology of an $SU(2)\times SU(2)\times U(1)$ model with lepton-flavour non-universality
• Study of B --> pi l nu and B --> rho l nu Decays and Determination of |V_ub|
• A note on isospin violation in Pl2(gamma) decays
• Dispersive representation and shape of the Kl3 form factors: robustness
• Reanalysis of pion pion phase shifts from K -> pi pi decays
• Improving the phenomenology of K_{l3} form factors with analyticity and unitarity
• Improved bounds on the radius and curvature of the K pi scalar form factor and implications to low-energy theorems
• Theoretical overview of kaon decays
• The $K\pi$ form factors from Analyticity and Unitarity