5. Theoretical Physics (CSN4)

Nucleon Form Factors and Pair production Analytically

by Prof. Earle Leonard Lomon (Massachusetts Inst. of Technology)

Auletta A1 (LNF)

Auletta A1


Via Enrico Fermi, 40 00044 Frascati (Roma)
The 2005 model for the nucleon elastic electromagnetic form factors, dominated by vector meson coupling to photons and having continuum and asymptotic QCD additions, fitted to available and predicted future data. Replacing the phenomenological fit to the dispersion calculation of 2 and 3 pions continuum effects with relativistic Breit-Wigner forms for the wide rho, rho' and omega' vector mesons, as required by the time-like region, the analytic form can be fitted simultaneously to both regions. In our work with Simone Pacetti, we obtain fits to the form factors and the electro-production of nucleon pairs.