Expanding Protons seen by HERA

Abstract

We show that the rising total photoproduction cross section recently observed at HERA is entirely consistant with the impact-picture in the theory of expanding protons which was proposed more than twenty years ago. More accurate data, which is expected to be forthcoming soon, will give this prediction a stringent test.

Comments: 4 pages, CPT-94/P.3060,LaTex,2 fig available on cpt.univ-mrs.fr directory pub/preprints/94/fundamental-interactions/94-P.3060