On factorization, quark counting and vector dominance

Using an eikonal structure for the scattering amplitude, Block and Kaidalov[1] have derived factorization theorems for nucleon-nucleon, γp and γγ scattering at high energies, using only some very general assumptions. We present here an analysis giving experimental confirmation for factorization of cross sections, nuclear slope parameters B and ρ-values (ratio of real to imaginary portion of forward scattering amplitudes), showing that: • the three factorization theorems[1] hold, • the additive quark model holds to ≈ 1%, • and vector dominance holds to better than ≈ 4%. Work partially supported by Department of Energy contract DA-AC02-76-Er02289 Task D. Work partially supported by Department of Energy Grant No. DE-FG02-95ER40896 and the University of Wisconsin Research Committee with funds granted by the Wisconsin Alumni Research Foundation.