Proton Opacity in the Light of LHC Diffractive Data.

Ryskin, M.G.; Martin, A.D.; Khoze, V.A.

Abstract

We show that collider data on elastic pp (and pp¯pp¯ ) scattering, including the LHC TOTEM data at 7 TeV, can be well described by a 3-channel eikonal model with only one Pomeron, with parameters that are naturally linked to the perturbative QCD (BFKL) framework. The proton opacity, determined in this way, is then used to account for sizeable absorptive effects. We study the recent measurements of dσ/dΔη made by the ATLAS collaboration, where they select events with large rapidity gaps Δη. We demonstrate that the absorptive corrections noticeably change both the value and the Δη dependence of the cross section. We find that our parameter-free calculation is in agreement with these ATLAS data.

Citation

Ryskin, M., Martin, A., & Khoze, V. (2012). Proton Opacity in the Light of LHC Diffractive Data. The European Physical Journal C, 72, Article 1937. https://doi.org/10.1140/epjc/s10052-012-1937-x

• Journal Article Type: Article
• Online Publication Date: Apr 3, 2012
• Publication Date: 2012-04
• Deposit Date: Mar 4, 2013
• Journal: European Physical Journal C: Particles and Fields
• Print ISSN: 1434-6044
• Electronic ISSN: 1434-6052
• Publisher: SpringerOpen
• Peer Reviewed: Peer Reviewed
• Volume: 72
• Article Number: 1937
• DOI: https://doi.org/10.1140/epjc/s10052-012-1937-x