Holographic description of the kaon gravitational form factor

TL;DR

This paper uses a holographic QCD model to calculate the kaon gravitational form factor, revealing its Q^2 dependence, high-energy behavior, and gravitational radius, and comparing it with the pion.

Contribution

It introduces a bottom-up holographic approach incorporating SU(3) flavor symmetry breaking to compute the kaon GFF.

Findings

Kaon GFF shows a 1/Q^2 falloff at high energy.

The gravitational radius of the kaon is similar to that of the pion.

The approach aligns with perturbative QCD predictions.

Abstract

We compute the kaon gravitational form factor (GFF) using a bottom-up holographic QCD approach that incorporates SU(3) flavor symmetry breaking through the strange quark mass. We present the resulting Q^2 dependence of the kaon GFF and compare it with that of the pion. In the high-energy limit, the kaon GFF exhibits a 1/Q^2 falloff, in agreement with perturbative QCD. Furthermore, we extract the gravitational radius of the kaon and find it to be almost the same as that of the pion, with a slightly smaller value.