Gravitational form factors of glueballs in Yang-Mills theory

TL;DR

This paper reports the first lattice QCD calculation of gravitational form factors of scalar glueballs, providing insights into their internal structure and comparison with other hadrons.

Contribution

It introduces the first determination of glueball energy-momentum tensor form factors using lattice Yang-Mills theory with variational operators.

Findings

Glueball GFFs are obtained at a single lattice spacing.

Comparison shows similarities and differences with other hadron GFFs.

Preliminary results pave the way for more detailed studies.

Abstract

This work presents preliminary results of the first determination of the energy-momentum tensor form factors of the scalar glueball, referred to as gravitational form factors (GFFs). The calculation has been carried out in lattice Yang-Mills theory at a single lattice spacing. Using variationally optimized operators, the matrix elements are extracted from ratios of three-point functions to two-point functions. The glueball GFFs and their kinematic dependence are compared to those of other hadrons from previous calculations.