Gravitational Form Factors of Vector Mesons in an AdS/QCD Model

TL;DR

This paper computes gravitational form factors of vector mesons using an AdS/QCD holographic model, revealing insights into their internal structure and constraints on generalized parton distributions.

Contribution

It introduces a holographic approach to calculate gravitational form factors of vector mesons, linking stress tensor form factors to parton distribution constraints.

Findings

Vector mesons are more compact in gravitational form factors than in charge form factors.

The model constrains the generalized parton distributions of vector mesons.

Stress tensor form factors provide key information on momentum and angular momentum sum rules.

Abstract

We calculate gravitational form factors of vector mesons using a holographic model of QCD. These provide restrictions on the generalized parton distributions of vector mesons, via the sum rules connecting stress tensor form factors to GPDs. We concentrate on the traceless part of the stress tensor, which suffices to fix the momentum and angular momentum sum rules. The vector mesons appear noticeably more compact measured by the gravitational form factors than by the charge form factor.