On Nucleon Electromagnetic Form Factors: A Pre'cis
arXiv:nucl-th/0501033 · doi:10.1016/j.nuclphysa.2005.03.031
Abstract
Electron scattering at large Q^2 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 G_E^p(Q^2)/G_M^p(Q^2) on 2<Q^2(GeV^2)<6 agrees with that inferred from polarisation transfer data, and exhibits a zero at Q^2\approx 6.5 GeV^2. There is some evidence that F_2(Q^2)/F_1(Q^2) \propto [\ln(Q^2/Λ^2)]^2/Q^2 for Q^2>6 GeV^2.
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
References in corpus (10)
- Measurement of GEp/GMp in ep -> ep to Q2 = 5.6 GeV2
- Precision Rosenbluth measurement of the proton elastic form factors
- Analytic properties of the Landau gauge gluon and quark propagators
- Analysis of a quenched lattice-QCD dressed-quark propagator
- Perturbative QCD Analysis of the Nucleon's Pauli Form Factor F_2(Q^2)
- Aspects and consequences of a dressed-quark-gluon vertex
- Implications of the discrepancy between proton form factor measurements
- Nucleon mass and pion loops
- On Nucleon Electromagnetic Form Factors
- Regarding proton form factors
Cited by in corpus (26)
- Baryons as relativistic three-quark bound states
- Nucleon electromagnetic form factors
- Hadron Properties and Dyson-Schwinger Equations
- Aspects of Hadron Physics
- Survey of nucleon electromagnetic form factors
- Nucleon electromagnetic form factors from the covariant Faddeev equation
- Measurement of the proton electric to magnetic form factor ratio from \vec ^1H(\vec e, e'p)
- QCD modeling of hadron physics
- Extraction and Interpretation of gamma N --> Delta Form Factors within a Dynamical Model
- Sigma Terms of Light-Quark Hadrons
- Mind the gap
- Aspects of the confinement mechanism in Coulomb-gauge QCD
- A covariant view on the nucleons' quark core
- Hadron structure at low Q^2
- Schwinger functions and light-quark bound states
- Matrix algorithms for solving (in)homogeneous bound state equations
- Delta-baryon mass in a covariant Faddeev approach
- Light-quarkonium spectra and orbital-angular-momentum decomposition in a Bethe-Salpeter-equation approach
- Theory and Phenomenology of Hadrons
- The mass of the nucleon in a chiral quark-diquark model
- Hadron properties from QCD bound-state equations: A status report
- Meson spectroscopy and properties using Dyson-Schwinger equations
- Proton and neutron form factors with quark orbital excitations
- Study on the Form Factors at Effective Vertices of Diqarks Interacting with Gauge Bosons
- S- and D-wave vector charmonia
- Partial-wave decomposition of the Faddeev amplitude of a Poincaré-invariant three-fermion bound state