Bonn 2010 – scientific programme

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T: Fachverband Teilchenphysik

T 29: QCD II

T 29.2: Talk

Tuesday, March 16, 2010, 17:00–17:15, HG X

Beam-background studies in the ATLAS detector — •Bernhard Meirose and Florian Ahles — Physikalisches Institut, University of Freiburg

One of the key signatures for new physics, in the ATLAS detector, rely on a good measurement of the missing transverse energy (MET). Therefore any sources of MET generate backgrounds to SUSY. Examples are: beamgas interactions and beam halo muons. We present preliminary results on beam-gas and beam-halo studies using Monte Carlo and single-beam data taken in September 2008 and November 2009. Clean-up cuts are developed using calorimeter and tracking information and a reasonable discrimination against QCD events is obtained.