Abstract
The top quark, discovered at the Tevatron in 1995 by the CDF and DO collaborations, is the heaviest known particle. The measurement of its properties are of interest to the under- standing of the strong and weak forces, as well as searches for physics beyond the Standard Model. Several measurements of top quark properties are presented using data collected at the ATLAS experiment located at the Large Hadron Collider (LHC) at √ s = 7 TeV centre-of-mass energy. The measurements include top quark polarisation, spin correlation, production of tand t¯γ ,a s well as top mass and Wtbvertex measurements in both the lepton + jets and dilepton channel.
Highlights
The top quark was discovered in 1995 at the Tevatron by the CDF and DØ collaborations [1]
All of the analyses presented here are in the lepton + jets and dilepton decay channels
The 2011 dataset collected with the ATLAS detector was used to measure many top quark properties at
Summary
The top quark was discovered in 1995 at the Tevatron by the CDF and DØ collaborations [1]. When a top quark pair ttis produced, if both top quarks decay leptonically, the channel is declared to be dilepton This channel contains two high pT leptons (either e or μ from W or τ decays), two b-jets and a significant portion of missing transverse energy from the two neutrinos. If both W bosons decay hadronically, the channel is classified as all-hadronic. If one of each W boson decay is observed, the channel is stated to be lepton + jets This channel contains one high pT lepton, four jets, again at least two of which are b-jets, and some missing transverse energy due to the escaping neutrino. All of the analyses presented here are in the lepton + jets and dilepton decay channels
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