Survival probability of large rapidity gaps in a QCD model with a dynamical infrared mass scale

We compute the survival probability 〈|S|2〉 of large rapidity gaps (LRG) in a QCD based eikonal model with a dynamical gluon mass, where this dynamical infrared mass scale represents the onset of nonperturbative contributions to the diffractive hadron-hadron scattering. Since rapidity gaps can occur in the case of Higgs boson production via fusion of electroweak bosons, we focus on WW→H fusion processes and show that the resulting 〈|S|2〉 decreases with the increase of the energy of the incoming hadrons, in line with the available experimental data for LRG. We obtain 〈|S|2〉=27.6±7.8% (18.2±7.0%) at Tevatron (CERN-LHC) energy for a dynamical gluon mass mg=400MeV.