Diffractive Higgs bosons and prompt photons at hadron colliders

Abstract

Models for soft color interactions have been successful in describing and predicting diffractive hard scattering processes in ep collisions at DESY HERA and ppbar at the Fermilab Tevatron. Here we present new comparisons of the model to recent diffractive dijet data, also showing good agreement. The topical issue of diffractive Higgs production at the Tevatron and LHC hadron colliders is further investigated. For H->gamma gamma the irreducible background of prompt photon pairs from qqbar->gamma gamma and gg->gamma gamma is always dominating, implying that higher branching ratio decay modes of the Higgs have to be used. However, such prompt photons can be used to test the basic prediction for Higgs production since gg->gamma gamma involves a quark loop diagram similar to gg->H.

arXiv comment5 pages, 4 figures, uses REVTeX4. Minor changes

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• Enhancement of prompt photons in ultrarelativistic proton-proton collisions from nonlinear gluon evolution at small-$x$
• Probing the diffractive production of Z boson pair at forward rapidities at the LHC