# Kaon form factor in holographic QCD

## TL;DR

This paper uses a holographic QCD model to calculate the kaon form factor, showing good agreement with experimental data at low momentum transfer and predicting a $1/Q^2$ behavior at high $Q^2$, consistent with QCD.

## Contribution

It presents a novel holographic QCD calculation of the kaon form factor that aligns with experimental data and extends predictions to high momentum transfer regions.

## Key findings

- Kaon form factor agrees with data at low $Q^2$
- Charge radius and decay constant match experiments
- Predicted $1/Q^2$ behavior at high $Q^2$

## Abstract

The kaon form factor in the spacelike region is calculated using a holographic QCD model with the "bottom-up" approach. We found that our result for the kaon form factor in low $Q^2$ has a remarkable agreement with the existing data, where $Q^2$ is the four-momentum transfer squared. The charge radius of the kaon, as well as the kaon decay constant, are found to be in a good agreement with the experiment data. We then predict the kaon form factor in the asymptotic region (larger $Q^2$) showing $1/Q^2$ behavior, which is consistent with the perturbative QCD prediction.