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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Cited by in corpus (33)

• FLAG Review 2019
• FLAG Review 2021
• Review of lattice results concerning low energy particle physics
• Kaon Decays in the Standard Model
• Physics with the KLOE-2 experiment at the upgraded DA$\varphi$NE
• An evaluation of |Vus| and precise tests of the Standard Model from world data on leptonic and semileptonic kaon decays
• Flavor Physics in the Quark Sector
• Charged-Higgs phenomenology in the Aligned two-Higgs-doublet model
• 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|
• Precision tests of fundamental physics with $\eta$ and ${\eta }^{\prime }$ mesons
• Global Effective-Field-Theory analysis of New-Physics effects in (semi)leptonic kaon decays
• Chiral expansions of the pi0 lifetime
• A note on isospin violation in Pl2(gamma) decays
• Dispersive representation and shape of the Kl3 form factors: robustness
• FLAG Review 2024
• Isospin breaking effects due to the up-down mass difference in Lattice QCD
• Analytical dispersive construction of $\eta \to 3\pi$ amplitude: First order in isospin breaking
• $|V_{us}|$ from $K_{\ell 3}$ decay and four-flavor lattice QCD
• Novel approaches in Hadron Spectroscopy
• Predicting the tau strange branching ratios and implications for V_{us}
• Kaon semileptonic vector form factor and determination of |V_{us}| using staggered fermions
• Chiral Extrapolation of the Strangeness Changing K pi Form Factor
• Dispersive analysis of K_{L mu3} and K_{L e3} scalar and vector form factors using KTeV data
• First determination of $f_{+}(0)|V_{us}|$ from a combined analysis of $\tau \to K\pi {\nu }_{\tau }$ decay and $\pi K$ scattering with constraints from $K_{\ell 3}$ decays
• On the scalar $\pi K$ form factor beyond the elastic region
• Dispersive representation of the scalar and vector Kpi form factors for tau --> K pi nu_tau and K_{l3} decays
• Reanalysis of pion pion phase shifts from K -> pi pi decays
• Stringent constraints on the scalar K pi form factor from analyticity, unitarity and low-energy theorems
• 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