Generalized form factors of the nucleon in a light-cone spectator-diquark model

TL;DR

This paper explores the generalized form factors of the nucleon using a light-cone spectator-diquark model, incorporating scalar and axial-vector diquarks, and compares results with lattice QCD data.

Contribution

It introduces a comprehensive light-cone spectator-diquark model including Melosh-Wigner rotation effects for both quarks and diquarks, providing detailed numerical results.

Findings

Results are consistent with lattice QCD data.

Inclusion of axial-vector diquarks enhances model accuracy.

The model offers deeper insights into nucleon structure.

Abstract

We investigate the generalized form factors of the nucleon in a light-cone spectator-diquark model. Compared to the form factors, the generalized form factors contain some more information of the structure of the nucleon. In our calculation, both the scalar and the axial-vector spectator-diquark are taken into account. As a relation between the spin in the instant form and that in the light-cone form, the Melosh-Wigner rotation effect is included for both the quark and the axial-vector diquark. We also provide numerical results from our model calculations, and the results are comparable with those from lattice QCD.