The possibility that the triple-Pomeron coupling vanishes at q t =0 E.G.S. Luna, V.A. Khoze, A.D. Martin and M.G. Ryskin Eur. Phys. J. C, 69 1-2 (2010) 95-101 Published online: 05 August 2010 DOI: 10.1140/epjc/s10052-010-1393-4