Electron Scattering from the Proton

Abstract

In Eqs. (4), (6), and (8)-(11) we have neglected relativistic corrections. For tt=sr/2 the relations (2) and (9) vanish whereas (10) and (11) become identical. There remain therefore six independent relations between the coeKcients b(sr/2)=c(sr/2), d(sr/2), and e(sr/2), i.e. , between five real parameters which determine the transition matrix T(sr/2, «b) except for an absolute phase factor. For angles 0&t7&sr/2, one can obtain eleven relations for nine parameters. The experimental quantities are of course not single-valued functions of these parameters, but the ambiguities may be reduced by comparing solutions for diGerent angles and energies. At lower energies also a phase shift analysis can be helpful. A more complete discussion, especially of the correlation experiments, will be published later.

Nucleon electromagnetic form factors

“…Quite early the interest turned to the nucleon; the first FF measurements of the proton were reported in 1955 [Hof55], and the first measurement of the neutron magnetic FF was reported by Yearian and Hofstadter [Yea58] in 1958. Simultaneously much theoretical work was expanded to the development of models of the nucleus, as well as the interaction of the electromagnetic probe with nuclei and the nucleon.…”

Nucleon form factors with2+1flavor dynamical domain-wall fermions

“…Early experiments revealed that the proton is a composite particle [4,5,6,7]: i.e. non-zero Pauli and Dirac mean-squared radii and anomalous magnetic moments were measured among other observables.…”

Electroproduction of neutral pions in the Hall A at the Jefferson Laboratory; Electroproduction de pions neutres dans le Hall A au Jefferson Laboratory

“…In the nonrelativistic approximation, the nucleon form factors are Fourier transforms of the charge and current distributions in the proton [3]. Another broad part of these experiments have been devoted to deep inelastic scattering (DIS), to study the PDFs.…”