Gravitational form factors of baryons in a spectator diquark model

TL;DR

This paper investigates the gravitational form factors of baryons using a diquark spectator model, linking energy momentum tensor properties to electromagnetic interactions and generalized parton distributions.

Contribution

It provides a detailed analysis of baryon gravitational form factors considering all quark-diquark configurations within the diquark spectator model.

Findings

Calculated gravitational form factors for various baryons.

Analyzed the role of different quark flavors in baryon structure.

Connected form factors to generalized parton distributions.

Abstract

Energy momentum tensor (EMT) expresses the interaction between the gravitation and the matter fields, in which the scattering off the graviton is a natural but infeasible probe. However, the EMT can be accessed indirectly through electromagnetic interactions in quantum chromodynamics. The matrix elements of the local EMT operator are parameterized by gravitational form factors, which are subsequently related to the generalized parton distributions. Within the diquark spectator model, we investigate the gravitational form factors of baryons. We consider all the feasible pairs of quark-diquark systems to understand the behavior of each constituent quark flavor of strange and non-strange baryons.