Mainz 2014 – scientific programme

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T: Fachverband Teilchenphysik

T 120: QCD 2

T 120.2: Talk

Thursday, March 27, 2014, 17:05–17:20, GFH 01-721

Total cross section measurement via elastic proton-proton scattering with the ALFA detector of ATLAS at the LHC — •Kristof Kreutzfeldt, Michael Düren, and Hasko Stenzel — 2. Physikalisches Institut, Univeristät Gießen

The ALFA (Absolute Luminosity for ATLAS) detector is one of the ATLAS forward detectors and is located about 240 m away from the ATLAS interaction point in the LHC tunnel. ALFA is a scintillating fibre tracking detector, that is designed to measure elastic proton-proton scattering up to the smallest scattering angles. The detector is housed in roman pots and can approach the beam to distances of about 1 millimetre range. In 2011 data was taken at a center-of-mass energy of √s = 7 TeV and with a special low intensity fill of LHC with high β^* = 90 m. The aim was to measure the t-spectrum, the elastic and total cross sections and the nuclear slope B. Preliminary results of the analysis will be presented in this talk.