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Measurement of the total cross section from elastic scattering in pp collisions at root s=7 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.
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Number of Authors: 2900
2014 (English)In: Nuclear Physics B, ISSN 0550-3213, E-ISSN 1873-1562, Vol. 889, 486-548 p.Article in journal (Refereed) Published
Abstract [en]

A measurement of the total pp cross section at the LHC at root s = 7 TeV is presented. In a special run with high-beta* beam optics, an integrated luminosity of 80 mu b(-1) was accumulated in order 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 vertical bar t vertical bar range from 0.01 GeV2 to 0.1 GeV2 to extrapolate to vertical bar t vertical bar --> 0, the total cross section, sigma(tot)(pp --> X), is measured via the optical theorem to be: sigma(tot)(pp --> X) = 95.35 +/- 0.38 (stat.) +/- 1.25 (exp.) +/- 0.37 (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 to vertical bar t vertical bar --> 0. In addition, the slope of the elastic cross section at small vertical bar t vertical bar is determined to be B = 19.73 +/- 0.14 (stat.) +/- 0.26 (syst.) GeV-2.

Place, publisher, year, edition, pages
2014. Vol. 889, 486-548 p.
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-159771DOI: 10.1016/j.nuclphysb.2014.10.019ISI: 000347016900021Scopus ID: 2-s2.0-84910002106OAI: oai:DiVA.org:kth-159771DiVA: diva2:787422
Funder
EU, European Research CouncilSwedish Research Council
Note

QC 20150210

Available from: 2015-02-10 Created: 2015-02-10 Last updated: 2017-12-04Bibliographically approved

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Strandberg, Jonas

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