Measurement of the total cross section from elastic scattering in pp collisions at √s = 7 TeV with the ATLAS detector

Allbrooke, B M M, Asquith, L, Cerri, A, Chavez Barajas, C A, De Santo, A, Salvatore, F, Santoyo Castillo, I, Suruliz, K, Sutton, M R, Vivarelli, I and The ATLAS Collaboration, (2014) Measurement of the total cross section from elastic scattering in pp collisions at √s = 7 TeV with the ATLAS detector. Nuclear Physics B, 889. pp. 486-548. ISSN 0550-3213

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Abstract

A measurement of the total pp cross section at the LHC at √s = 7 TeV is presented. In a special run with high-β⋆ beam optics, an integrated luminosity of 80 μb−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 |t| range from 0.01 GeV2 to 0.1 GeV2 to extrapolate to |t|→0, the total cross section, σtot(pp→X), is measured via the optical theorem to be:

σtot(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 |t|→0. In addition, the slope of the elastic cross section at small |t| is determined to be B=19.73±0.14(stat.)±0.26(syst.) GeV−2.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Research Centres and Groups: Experimental Particle Physics Research Group
Subjects: Q Science > QC Physics
Depositing User: Billy Wichaidit
Date Deposited: 03 May 2017 11:43
Last Modified: 03 May 2017 11:48
URI: http://sro.sussex.ac.uk/id/eprint/67638

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Project NameSussex Project NumberFunderFunder Ref
ATLASG0275STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCILST/I006048/1