The Inclusive-Exclusive Connection and the Neutron Negative Central Charge Density

TL;DR

This paper interprets the negative central charge density of the neutron by linking deep inelastic scattering data at high Bjorken x to transverse charge densities using generalized parton distribution models, highlighting the dominance of d quarks at large x.

Contribution

It introduces a model-based interpretation connecting neutron charge density with quark distributions at high x, emphasizing the role of the Drell-Yan-West relation.

Findings

d quarks dominate neutron structure at large x

large x quarks influence transverse charge distribution

model explains negative central charge density

Abstract

We find an interpretation of the recent finding that the central charge density of the neutron is negative by using models of generalized parton distributions at zero skewness to relate the behavior of deep inelastic scattering quark distributions, evaluated at large values of Bjorken x, to the transverse charge density evaluated at small distances. The key physical input of these models is the Drell-Yan-West relation We find that the d quarks dominate the neutron structure function for large values of Bjorken x, where the large longitudinal momentum of the struck quark has a significant impact on determining the center-of-momentum of the system, and thus the "center" of the nucleon in the transverse position plane.