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

, The ATLAS collaboration (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

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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, σtot(pp → X), is measured via the optical theorem to be: σtot(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:
Journal Article
Journal or Publication Title:
Physics Letters B
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3106
Subjects:
ID Code:
83949
Deposited By:
Deposited On:
11 Jan 2017 16:50
Refereed?:
Yes
Published?:
Published
Last Modified:
14 Oct 2021 03:35