Work

Nucleon charge and magnetisation distributions: Flavour separation and zeroes

Year: 2024

Type: article

Abstract: A symmetry-preserving truncation of the quantum field equations describing hadron properties is used to deliver parameter-free predictions for all nucleon elastic electromagnetic form factors and their flavour separation to large values of momentum transfer, Q 2 . The proton electric form factor, G E p , possesses a zero, whereas that of the neutron, G E n , does not. The difference owes to the behaviour of the Pauli form factor of the proton’s singly-represented valence d -quark. Consequently, G E n > G E p on a material large- Q 2 domain. These predictions can be tested in modern experiments.

Source: Fundamental Research

DOI: 10.1016/j.fmre.2024.11.005

Authors: Zhao-Qian Yao, Daniele Binosi, Zhu-Fang Cui, Craig D. Roberts

Institutions: European Centre for Theoretical Studies in Nuclear Physics and Related Areas, Nanjing University

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond