Nucleon resonances and transition form factors

TL;DR

This paper reviews the experimental determination of nucleon resonance transition form factors from meson electro-production, comparing results with lattice QCD and quark models to deepen understanding of strong QCD dynamics.

Contribution

It provides a comprehensive review of space-like transition form factors from experiments and compares them with theoretical approaches, highlighting progress and challenges.

Findings

Agreement between experimental data and lattice QCD in certain regimes

Discrepancies indicating areas for theoretical improvement

Enhanced understanding of nucleon structure and strong QCD

Abstract

This is a contribution to the review 50 Years of Quantum Chromodynamics edited by F. Gross and E. Klempt, to be published in Journal EPJC. This contribution reviews the nucleon resonance transition form factors determined from meson electro-production experiments at electron accelerator facilities, i.e. this contribution focuses on space-like transition form factors and amplitudes. Comparisons are made when available to LQCD and to approaches with traceable links to strong QCD and to advanced quark model calculations