Abstract
We present a new framework for the modelling of hard diffraction in pp and \( \mathrm{p}\overline{\mathrm{p}} \) 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 \( \mathrm{p}\overline{\mathrm{p}} \) and pp data reveal improvement in the description of single diffractive events.
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Rasmussen, C.O., Sjöstrand, T. Hard diffraction with dynamic gap survival. J. High Energ. Phys. 2016, 142 (2016). https://doi.org/10.1007/JHEP02(2016)142
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DOI: https://doi.org/10.1007/JHEP02(2016)142