LU-TP-15-56
MCNET-15-36
arXiv:1512.05525
JHEP 1602 (2016) 142

by: Rasmussen, Christine O. (Lund U., Dept. Theor. Phys.) et al.

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.