Total photoproduction cross section at very high energy R. M. Godbole, A. Grau, G. Pancheri and Y. N. Srivastava Eur. Phys. J. C, 63 1 (2009) 69-85 Published online: 21 July 2009 DOI: 10.1140/epjc/s10052-009-1093-0