On the role of hard rescattering in exclusive diffractive Higgs   production
  We discuss the contribution of so-called semi-enhanced hard rescattering corrections to central exclusive diffractive Higgs production, pp -> p+H+p, at the LHC. We present arguments to show that these corrections are small. We confirm these expectations by considering HERA data for leading neutron production. 
V.A. Khoze, A.D. Martin and M.G. Ryskin