Abstract
A measurement of the total pp cross section at the LHC at root s = 7 TeV is presented. In a special run with high-beta* beam optics, an integrated luminosity of 80 mu b(-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 vertical bar t vertical bar range from 0.01 GeV2 to 0.1 GeV2 to extrapolate to vertical bar t vertical bar —\textgreater 0, the total cross section, sigma(tot)(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|t|→0. In addition, the slope of the elastic cross section at small |t||t| is determined to be View the MathML sourceB=19.73±0.14(stat.)±0.26(syst.) GeV−2.
Item Type: | Journal article |
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Form of publication: | Publisher's Version |
Faculties: | Physics |
Subjects: | 500 Science > 530 Physics |
URN: | urn:nbn:de:bvb:19-epub-24301-2 |
ISSN: | 0550-3213 |
Annotation: | SCOAP3-Publikation. - Weitere Autoren siehe PDF-Volltext |
Language: | English |
Item ID: | 24301 |
Date Deposited: | 20. May 2015, 06:30 |
Last Modified: | 08. May 2024, 08:35 |