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Measurement of the total cross section from elastic scattering in pp collisions at s=8 TeV with the ATLAS detector
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0002-8913-0981
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Number of Authors: 28442016 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 761, p. 158-178Article in journal (Refereed) Published
Abstract [en]

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 beσtot(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.

Place, publisher, year, edition, pages
Elsevier, 2016. Vol. 761, p. 158-178
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Physical Sciences
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URN: urn:nbn:se:kth:diva-202314DOI: 10.1016/j.physletb.2016.08.020ISI: 000384469900024Scopus ID: 2-s2.0-85000796407OAI: oai:DiVA.org:kth-202314DiVA, id: diva2:1075760
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QC 20170221

Available from: 2017-02-21 Created: 2017-02-21 Last updated: 2017-11-29Bibliographically approved

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