2003/05/23 by Thomas Fuchs, T. Fuchs, Jambul Gegelia +3 · 72 citations
Physics and Astronomy · #Baryon #Chiral perturbation theory #Curvature #Form factor (electronics) #High-Energy Particle Collisions Research #Mathematical physics #Nucleon #Particle physics #Particle physics theoretical and experimental studies #Pauli exclusion principle #Perturbation theory (quantum mechanics) #Physics #Quantum Chromodynamics and Particle Interactions #Quantum electrodynamics #Quantum mechanics #Quark #Regularization (linguistics) #Renormalization #hep-ph #nucl-ex #nucl-th
paper · pdf · doi:10.1088/0954-3899/30/10/008
published in Journal of Physics G Nuclear and Particle Physics 30(10), 1407-1426 (IOP Publishing) · 25 pages, RevTex, 8 figures
arxiv created 2003/05/23 · openalex publication_date 2004/09/08 · arxiv updated 2009/11/30 · openalex created_date 2019/06/27 · openalex updated_date 2026/08/05
The electromagnetic form factors of the nucleon are calculated at order q4 in the relativistic formulation of baryon chiral perturbation theory. In order to obtain a consistent power counting for the renormalized diagrams we make use of the extended on-mass-shell renormalization scheme which we have discussed in a recent paper. We analyze the Dirac and Pauli form factors, F1 and F2, as well as the electric and magnetic Sachs form factors, GE and GM. Our results are compared with those obtained in the heavy-baryon approach and in the (relativistic) infrared regularization. In addition, the Sachs form factors are compared with experimental data. We confirm previous findings that a one-loop calculation of the electromagnetic form factors does not generate sufficient curvature for the Sachs form factors GpE, GpM, and GnM. Moreover, the electric form factor of the neutron is very sensitive to higher-order contributions.