Forward Compton scattering using real analytic amplitudes

We analyze forward Compton scattering, using real analytic amplitudes. By fitting the total γp scattering cross section data in the high energy region 5 GeV≤√(s)≤200 GeV, using a cross section rising as ln2s, we calculate ργp, the ratio of the real to the imaginary portion of the forward Compton scattering amplitude, and compare this to ρnn, the ratio of the even portions of the pp and p(bar sign)p forward scattering amplitudes. We find that the two ρ values are, within errors, the same in the c.m.s. energy region 5 GeV≤√(s)≤200 GeV, as predicted by a factorization theorem of Block and Kaidalov