arXiv:1002.0103·v1·High Energy Physics — Phenomenology
Dispersion Relation for the Nucleon Electromagnetic Form Factors
Susumu Furuichi (Department of Physics, Rikkyo University, Toshima Tokyo 171-8501, Japan)🇯🇵 · Hirohisa Ishikawa (Department of Economy, Meikai University, Urayasu Chiba, 279-8550, Japan)🇯🇵 · Keiji Watanbe (Department of Physics, Meisei University, Hino Tokyo 191-8506, Japan)🇯🇵
Abstract
Elastic electromagnetic form factors of nucleons are investigated both for the time-like and the space-like momentums by using the unsubtracted dispersion relation with QCD constraints. It is shown that the calculated form factors reproduce the experimental data reasonably well; they agree with recent experimental data for the neutron magnetic form factors for the space-like data obtained by the CLAS collaboration and are compatible with the ratio of the electric and magnetic form factors for the time-like momentum obtained by the BABAR collaboration.
Comments: 16pages 9figures