Measurement of the total cross section from elastic scattering in pp collisions at √s=8 TeV with the ATLAS detector



Aaboud, M, Aad, G, Abbott, B, Abdallah, J, Abdinov, O, Abeloos, B, Aben, R, AbouZeid, OS, Abraham, NL, Abramowicz, H
et al (show 2851 more authors) (2016) Measurement of the total cross section from elastic scattering in pp collisions at √s=8 TeV with the ATLAS detector PHYSICS LETTERS B, 761. pp. 158-178. ISSN 0370-2693, 1873-2445

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Abstract

A measurement of the total pp cross section at the LHC at s=8 TeV is presented. An integrated luminosity of 500 μb−1 was accumulated in a special run with high-β beam optics to measure the differential elastic cross section as a function of the Mandelstam momentum transfer variable t. The measurement is performed with the ALFA sub-detector of ATLAS. Using a fit to the differential elastic cross section in the −t range from 0.014 GeV2 to 0.1 GeV2 to extrapolate t→0, the total cross section, σ<inf>tot</inf>(pp→X), is measured via the optical theorem to be σ<inf>tot</inf>(pp→X)=96.07±0.18(stat.)±0.85(exp.)±0.31(extr.)mb, where the first error is statistical, the second accounts for all experimental systematic uncertainties and the last is related to uncertainties in the extrapolation t→0. In addition, the slope of the exponential function describing the elastic cross section at small t is determined to be B=19.74±0.05(stat.)±0.23(syst.)GeV−2.

Item Type: Article
Additional Information: 17 pages plus author list + cover page (35 pages total), 4 figures, 2 tables, submitted to PLB. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2015-22/
Uncontrolled Keywords: hep-ex, hep-ex
Depositing User: Symplectic Admin
Date Deposited: 03 Jan 2017 15:34
Last Modified: 24 Jun 2026 14:53
DOI: 10.1016/j.physletb.2016.08.020
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3005066
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