Global Analysis of Nucleon Strange Form Factors at Low $Q^2$

TL;DR

This paper conducts a comprehensive analysis of experimental data to determine the nucleon's strange electric and magnetic form factors at low momentum transfer, providing updated values with uncertainties.

Contribution

It presents the first global analysis combining all recent elastic parity-violating electron scattering data at low $Q^2$ to extract nucleon strange form factors.

Findings

$G^s_E = -0.008 \, \pm \, 0.016$ at $Q^2=0.1$ GeV$^2$

$G^s_M = 0.29 \, \pm \, 0.21$ at $Q^2=0.1$ GeV$^2$

Provides constraints on strange quark contributions to nucleon structure.

Abstract

We perform a global analysis of all recent experimental data from elastic parity-violating electron scattering at low $Q^2$. The values of the electric and magnetic strange form factors of the nucleon are determined at $Q^2 = 0.1$ GeV/$c^2$ to be $G^s_E = -0.008 \pm 0.016$ and $G^s_M = 0.29 \pm 0.21$.