One-loop effects in the main irreducible background to exclusive production at the LHC A. G. Shuvaev, V. A. Khoze, A. D. Martin and M. G. Ryskin Eur. Phys. J. C, 56 4 (2008) 467-477 Published online: 31 July 2008 DOI: 10.1140/epjc/s10052-008-0675-6