Gravitational form factors and mechanical properties of a quark at one loop in light-front Hamiltonian QCD

Abstract

We calculate the gravitational form factors (GFFs) and pressure, shear, and energy distributions for a quark state dressed with a gluon at one loop in QCD. We use the light-front Hamiltonian approach. In the light-front gauge, we use a two-component formalism to eliminate the constrained fields. The state may be thought of as a perturbative model for a relativistic spin-$1/2$ composite system having a gluonic degree of freedom. We compare the results with model calculations for a nucleon.