Spin Structure of Nucleon and Equivalence Principle

TL;DR

This paper explores the nucleon spin structure through energy momentum tensor form factors, linking it to gravitational interactions and proposing a generalized equivalence principle that predicts equal momentum and angular momentum partition.

Contribution

It introduces a generalized equivalence principle relating nucleon spin structure to gravitational form factors and predicts zero anomalous gravitomagnetic moment.

Findings

Predicted zero anomalous gravitomagnetic moment.

Established equal partition of momentum and angular momentum.

Linked nucleon spin structure to gravitational form factors.

Abstract

The partition of nucleon spin between total angular momenta of quarks and gluons is described by the energy momentum tensor formfactors manifested also in the nucleon scattering by weak classical gravitational field. Natural generalization of equivalence principle is resulting in the identically zero "Anomalous gravitomagnetic moment" being the straightforward analog of its electromagnetic counterpart. This, in turn, means the equal partition of momentum and total angular momentum, anticipated earlier.}