Form factors and other measures of strangeness in the nucleon

TL;DR

This paper reviews experimental and theoretical insights into strange-quark contributions to nucleon structure, focusing on form factors and parton distributions, and introduces a model linking strangeness asymmetry with form factors.

Contribution

It presents a novel model connecting strange-quark asymmetry in momentum space with the transverse distribution of strangeness in the nucleon.

Findings

Strangeness form factors provide key insights into nucleon structure.

The model relates s(x)-sbar(x) asymmetry to the form factor F1^s(t).

Results suggest significant strangeness contributions to nucleon properties.

Abstract

We discuss the phenomenology of strange-quark dynamics in the nucleon, based on experimental and theoretical results for electroweak form factors and for parton densities. In particular, we construct a model for the generalized parton distribution that relates the asymmetry s(x)-sbar(x) between the longitudinal momentum distributions of strange quarks and antiquarks with the form factor F1^s(t), which describes the distribution of strangeness in transverse position space.