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Scientific article
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English

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

ContributorsATLAS Collaboration
Published inPhysics letters. B, vol. 761, p. 158-178
Collection
  • Open Access - SCOAP3
Publication date2016
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 .

Citation (ISO format)
ATLAS Collaboration. Measurement of the total cross section from elastic scattering in pp collisions at √s = 8 TeV with the ATLAS detector. In: Physics letters. B, 2016, vol. 761, p. 158–178. doi: 10.1016/j.physletb.2016.08.020
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Article (Published version)
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ISSN of the journal0370-2693
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