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

ATLAS Collaboration; G Aad; Paul Newman

doi:10.1016/j.nuclphysb.2014.10.019

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

ATLAS Collaboration, G Aad, Paul Newman

Physics and Astronomy

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Abstract

A measurement of the total pp cross section at the LHC at √s = 7TeV 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, σ_tot (pp→X), is measured via the optical theorem to be: σ_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 |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.

Original language	English
Pages (from-to)	486-548
Number of pages	63
Journal	Nuclear Physics, Section B
Volume	889
Early online date	28 Oct 2014
DOIs	https://doi.org/10.1016/j.nuclphysb.2014.10.019
Publication status	Published - 1 Dec 2014

Bibliographical note

All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2013-10/

Keywords

hep-ex

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AadG2014MeasurementFinal published version, 2.14 MBLicence: Creative Commons: Attribution (CC BY)

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@article{347830a40b5f41e3985075d19c3f7451,

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

abstract = " A measurement of the total pp cross section at the LHC at √s = 7TeV 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. ",

keywords = "hep-ex",

author = "{ATLAS Collaboration} and G Aad and Paul Newman",

note = "All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2013-10/",

year = "2014",

month = dec,

day = "1",

doi = "10.1016/j.nuclphysb.2014.10.019",

language = "English",

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journal = "Nuclear Physics, Section B",

issn = "0550-3213",

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TY - JOUR

T1 - Measurement of the total cross section from elastic scattering in pp collisions at √s = 7TeV with the ATLAS detector

AU - ATLAS Collaboration

AU - Aad, G

AU - Newman, Paul

N1 - All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2013-10/

PY - 2014/12/1

Y1 - 2014/12/1

N2 - A measurement of the total pp cross section at the LHC at √s = 7TeV 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.

AB - A measurement of the total pp cross section at the LHC at √s = 7TeV 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.

KW - hep-ex

U2 - 10.1016/j.nuclphysb.2014.10.019

DO - 10.1016/j.nuclphysb.2014.10.019

M3 - Article

SN - 0550-3213

VL - 889

SP - 486

EP - 548

JO - Nuclear Physics, Section B

JF - Nuclear Physics, Section B

ER -

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

Abstract

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Keywords

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