Diffraction, Saturation and pp Cross Sections at the LHC

Details Diffraction, Saturation and pp Cross Sections at the LHC Diffraction, Saturation and pp Cross Sections at the LHC

2011-05-25

arxiv.org/abs/1105.4916v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 0 figures; Presented at XLVI^th Rencontres de Moriond, QCD and High Energy Interactions, La Thuile, Aosta Valley, Ita

Scientific paper

Results from the large hadron collider (LHC) show that no available Monte Carlo simulation incorporates our pre-LHC knowledge of soft and hard diffraction in a way that could be reliably extrapolated to LHC energies. As a simulation is needed to establish triggers, perform underlying event corrections and calculate acceptances, the lack of a robust simulation affects all measurements at the LHC. Particularly affected are the measurements of processes with large diffractive rapidity gaps, which constitute about one quarter of the inelastic cross section. In this paper, a previously described phenomenological model based on a saturation effect observed in single diffraction dissociation in pre-LHC data, validated by its successful application to several diffractive processes, is used to predict the total and total-inelastic proton-proton cross sections at the LHC. The prediction for the total-inelastic cross section at a center of mass collision energy of 7 TeV is compared with recent results from ATLAS and CMS.

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