Electromagnetic Form Factors of Nucleons with QCD Constraints Sytematic   Study of the Space and Time-like Regions
  Elastic electromagnetic form factors of nucleons are investigated both for the time-like and the space-like momentums under the condition that the QCD constraints are satisfied asymptotically. The unsubtracted dispersion relation with the superconvergence conditions are used as a realization of the QCD conditions. The experimental data are analyzed by using the dispersion formula and it is shown that the calculated form factors reproduce the experimental data reasonably well. 
Susumu Furuichi, Hirohisa Ishikawa, Keiji Watanabe