Luminosity determination in pp collisions at √s = 8 TeV using the ATLAS detector at the LHC
2016 (English)In: European Physical Journal C, ISSN 1434-6044, E-ISSN 1434-6052, Vol. 761, 158-178 p.Article in journal (Refereed) Published
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
2016. Vol. 761, 158-178 p.
IdentifiersURN: urn:nbn:se:kth:diva-202634DOI: 10.1140/epjc/s10052-016-4466-1ScopusID: 2-s2.0-84999293159OAI: oai:DiVA.org:kth-202634DiVA: diva2:1078096
QC 201703022017-03-022017-03-022017-03-02Bibliographically approved