Pion and Vector Meson Form Factors in the Kuperstein-Sonnenschein holographic model

TL;DR

This paper investigates the spectrum and form factors of mesons in the Kuperstein-Sonnenschein holographic model, demonstrating vector meson dominance and good agreement with experimental QCD data.

Contribution

It provides the first detailed calculation of meson spectra, couplings, and form factors within the KS holographic model, confirming vector meson dominance.

Findings

Vector meson dominance is realized in the model.

Pion form factor matches experimental data.

Good agreement with QCD results for meson properties.

Abstract

We study phenomenological aspects of the holographic model of chiral symmetry breaking recently introduced by Kuperstein and Sonnenschein (KS). As a first step, we calculate the spectrum of vector and axial-vector mesons in the KS model. We numerically compute various coupling constants of the mesons and pions. Our analysis indicates that vector meson dominance is realized in this model. The pion, vector meson and axial-vector meson form factors are obtained and studied in detail. We find good agreement with QCD results. In particular, the pion form factor closely matches available experimental data.