Nucleon electromagnetic form factors from the covariant Faddeev equation
Apr, 2011Citations per year
Abstract: (arXiv)
We compute the electromagnetic form factors of the nucleon in the Poincare-covariant Faddeev framework based on the Dyson-Schwinger equations of QCD. The general expression for a baryon's electromagnetic current in terms of three interacting dressed quarks is derived. Upon employing a rainbow-ladder gluon-exchange kernel for the quark-quark interaction, the nucleon's Faddeev amplitude and electromagnetic form factors are computed without any further truncations or model assumptions. The form factor results show clear evidence of missing pion-cloud effects below a photon momentum transfer of ~2 GeV^2 and in the chiral region whereas they agree well with experimental data at higher photon momenta. Thus, the approach reflects the properties of the nucleon's quark core.Note:
- 23 pages, 10 figures, 2 tables
- 11.80.Jy
- 14.20.Dh
- 13.40.Gp
- 12.38.Lg
- form factor: electromagnetic
- nucleon: form factor
- current: electromagnetic
- quark quark: interaction
- quantum chromodynamics
- momentum transfer dependence
References(0)
Figures(11)
Loading ...