Speaker
Dr.
Hasko Stenzel
(Giessen University)
Description
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 GeV^{2} to -t=0.38 GeV^{2} with the ALFA detector of ATLAS. From the extrapolation of the differential elastic cross section to t=0 GeV^2 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.
Primary author
Collaboration ATLAS
(CERN)
