2005/01/12 by A Hoell, A. Höll, R. Alkofer +8 · 3 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-lat #hep-ph #nucl-ex #nucl-th
paper · pdf · doi:10.1016/j.nuclphysa.2005.03.031
published as Nucl.Phys.A755:298-302,2005 · Contribution to the proceedings of "Baryons 04," the 10th International Conference on the Structure of Baryons, 25-29/Oct./04, Ecole Polytechnique, Palaiseau; 5 pages, 3 figures
arxiv created 2005/01/12 · openalex publication_date 2005/05/29 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Electron scattering at large Q2 probes a nucleon's quark core. This core's contribution to electromagnetic form factors may be calculated using Poincare' covariant Faddeev amplitudes combined with a nucleon-photon vertex that automatically fulfills a Ward-Takahashi identity for on-shell nucleons. The calculated behaviour of GEp(Q2)/GMp(Q2) on 2<Q2(GeV2)<6 agrees with that inferred from polarisation transfer data, and exhibits a zero at Q2≈ 6.5 GeV2. There is some evidence that F2(Q2)/F1(Q2) ∝ [ln(Q2/Λ2)]2/Q2 for Q2>6 GeV2.