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https://hdl.handle.net/10316/109516
Title: | Measurement of the total cross section from elastic scattering in pp collisions at √s=7 TeV with the ATLAS detector | Authors: | Santos, S. P. Amor dos Carvalho, J. Fiolhais, M. C. N. Galhardo, B. Veloso, F. Wolters, H. ATLAS Collaboration |
Issue Date: | 2014 | Publisher: | Elsevier | Serial title, monograph or event: | Nuclear Physics B | Volume: | 889 | 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. | URI: | https://hdl.handle.net/10316/109516 | DOI: | 10.1016/j.nuclphysb.2014.10.019 | Rights: | openAccess |
Appears in Collections: | FCTUC Física - Artigos em Revistas Internacionais |
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Measurement of the total cross section from elastic scattering in pp collisions at √s=7 TeV with the ATLAS detector.pdf | 2.19 MB | Adobe PDF | View/Open |
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