The neutron negative central charge density: an inclusive-exclusive connection

TL;DR

This paper uses models of generalized parton distributions to interpret the negative central charge density of the neutron, linking deep inelastic scattering data to transverse charge distributions.

Contribution

It provides a novel interpretation of the neutron's negative central charge density through the connection between parton distributions and transverse charge densities.

Findings

D quarks dominate neutron structure at high x

Negative central charge density of neutron explained

Transverse position analysis links to deep inelastic scattering

Abstract

Models of generalized parton distributions at zero skewness are used to relate the behavior of deep inelastic scattering quark distributions, evaluated at high x, to the transverse charge density evaluated at small distances. We obtain an interpretation of the recently obtained negative central charge density of the neutron. The d quarks dominate the neutron structure function for large values of Bjorken x, where the large momentum of the struck quark has a significant impact on determining the center of momentum, and thus the ``center'' of the nucleon in the transverse position plane.