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Measurement of the total cross section of pp collisons at sqrt(s)=7 TeV from elastic scattering with the ATLAS detector

Abstract : The ATLAS measurement of the total p-p cross section at the LHC at sqrt(s)= 7 TeV is presented. In a special LHC run with high betastar beam optics corresponding to an integrated luminosity of 80 inverse microbarn the elastic scattering process is measured in the range of the momentum transverse t from -t=0.0025 GeVˆ{2} to -t=0.38 GeVˆ{2} with the ALFA detector of ATLAS. From the extrapolation of the differential elastic cross section to t=0 GeVˆ2 using the optical theorem the total cross section sigma(pp->X) is extracted with the luminosity-dependent method. In addition the nuclear slope of the elastic t-spectrum, the total elastic and inelastic cross sections are determined.
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http://hal.in2p3.fr/in2p3-01080625
Contributor : Sabine Starita <>
Submitted on : Wednesday, November 5, 2014 - 5:04:19 PM
Last modification on : Wednesday, September 16, 2020 - 4:30:44 PM

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  • HAL Id : in2p3-01080625, version 1

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Patrick Puzo. Measurement of the total cross section of pp collisons at sqrt(s)=7 TeV from elastic scattering with the ATLAS detector. MPI @ LHC 2014 – 6th International Workshop on Multiple Partonic Interactions at the LHC, Nov 2014, Krakow, Poland. ⟨in2p3-01080625⟩

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