Hard Diffraction with Dynamic Gap Survival

Abstract

We present a new framework for the modelling of hard diffraction in pp and ppbar collisions. It starts from the the approach pioneered by Ingelman and Schlein, wherein the single diffractive cross section is factorized into a Pomeron flux and a Pomeron PDF. To this it adds a dynamically calculated rapidity gap survival factor, derived from the modelling of multiparton interactions. This factor is not relevant for diffraction in ep collisions, giving non-universality between HERA and Tevatron diffractive event rates. The model has been implemented in Pythia 8 and provides a complete description of the hadronic state associated with any hard single diffractive process. Comparisons with ppbar and pp data reveal improvement in the description of single diffractive events.

30 pages, 13 figures. Replaced with published version

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• Pinning down the gauge boson couplings in $WW\gamma$ production using forward proton tagging
• Exclusive and diffractive quarkonium -- pair production at the LHC and FCC
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• Probing the diffractive production of gauge bosons at forward rapidities
• Double heavy quarkonium production in diffractive processes at the Run 2 LHC energy
• Searches for QCD instantons with forward proton tagging
• Diffractive dijet production: breakdown of factorization
• Diffractive gauge boson production at the LHC as a probe of the flavour content of the Pomeron