Discussion of elastic form factor fits for RSS

• Fortran code to calculate the proton and neutron magnetic and electric form factors. Uses fit from 'A new parameterization of the nucleon elastic form factors' by R. Bradford, A. Bodek, H. Budd, J. Arrington ( call it the BBBA05 fit).
• Fortran code to calculate the proton magnetic and electric form factors fitted to proton form factors using data corrected for two-photon effects. Uses fit from 'Global analysis of proton elastic form factor data with two-photon exchange corrections' by J. Arrington, W. Melnitchouk, J. A. Tjon ( call it AMT07 or 'two gamma').
Fortran code to calculate the proton and neutron magnetic and electric form factors. Uses fit from 'Effect of recent R_p and R_n measurements on extended Gari-Krumpelmann model fits to nucleon electromagnetic form factors' by Earle L. Lomon ( call it Lomon06 or GKex05). Update of 2002 fits using new data.
• Plot of proton and neutron magnetic and electric form factors compared to fits of BBBA05 (red curve) , AMT07 or Two gamma (blue curve) and Lomon06 or in his paper GKex05 (green curve). The form factor data has not been extracted with the inclusion of two-photon effects. This is why the "two gamma" curve for proton magnetic form factor is above the data.
Suggestion to use the BBBA05 fit for the neutron proton form factors and the 'two gamma' fit for the proton form factors