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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.ORCID iD: 0000-0003-3867-0336
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.ORCID iD: 0000-0002-0299-8236
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: 2019-12-19Bibliographically approved

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