Nucleon form factors and a nonpointlike diquark

1999/07/30 by Jacques Bloch, J. C. R. Bloch, C. D. Roberts +6 · 7 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-lat #hep-ph #nucl-ex #nucl-th

paper · pdf · doi:10.1103/physrevc.60.062201

published as Phys.Rev.C60:062201,1999 · 5 pages, REVTEX, epsfig, 3 figures

arxiv created 1999/07/30 · openalex publication_date 1999/11/02 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Nucleon form factors are calculated on q²\ensuremath∈[0,3]GeV² using an ansatz for the nucleon's Faddeev amplitude motivated by quark-diquark solutions of the relativistic Faddeev equation. Only the scalar diquark is retained, and it and the quark are confined. A good description of the data requires a nonpointlike diquark correlation with an electromagnetic radius of 0.8r_\ensuremathπ. The composite, nonpointlike nature of the diquark is crucial. It provides for diquark-breakup terms that are of greater importance than the diquark photon absorption contribution.

Citations

• Pseudovector components of the pion,π0→γγ,andFπ(q2)
• Octet and decuplet baryons in a covariant and confining diquark-quark model

Cited by

• Selected nucleon form factors and a composite scalar diquark
• K→ππand a light scalar meson
• Proton Electromagnetic-Form-Factor Ratios at LowQ2
• Nucleon mass and pion loops
• Nucleon and pion distribution functions in the valence region
• Quark-photon vertex and the pion charge radius
• A comparison between relativistic and semi-relativistic treatment in the diquark–quark model