Strange meson form factors in holographic QCD

TL;DR

This paper investigates strange meson electromagnetic form factors using a holographic QCD model, successfully matching experimental charge radii for some mesons and providing detailed form factor predictions.

Contribution

It introduces holographic QCD calculations for strange meson form factors, comparing results with experimental data and other theoretical approaches.

Findings

Charge radius of charged kaon matches experimental data.

Charge radius of charged pion slightly smaller than experimental value.

Form factors of mesons agree with Dyson-Schwinger calculations and experimental data.

Abstract

We consider the electromagnetic form factors of strange vector, axial vector and pseudoscalar mesons in a holographic QCD model. We find the charge radius of charged kaon agrees with the experiment, while the charge radius of charged pion is a little bit smaller than the experimental value, as obtained in other calculations in the hard-wall holographic QCD models. The charge radii of charged rho and $K^\ast$ quantitatively agree with a recent Dyson-Schwinger equation calculation. We also present the electric form factors of vector, axial vector and pseudoscalar mesons in both space-like and time-like regions. We find the charged kaon form factor is in agreement with the experiment data.