Measurement of the charge asymmetry in dileptonic decays of top quark pairs in pp collisions at √s = 7 TeV using the ATLAS detector
A measurement of the top-antitop (t[bar over t]) charge asymmetry is presented using data corresponding to an integrated luminosity of 4.6 fb[superscript −1] of LHC pp collisions at a centreof-mass energy of 7 TeV collected by the ATLAS detector. Events with two charged leptons, at least two jets an...
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
Springer-Verlag,
2015-08-24T12:46:57Z.
|
| Subjects: | |
| Online Access: | Get fulltext |
| Summary: | A measurement of the top-antitop (t[bar over t]) charge asymmetry is presented using data corresponding to an integrated luminosity of 4.6 fb[superscript −1] of LHC pp collisions at a centreof-mass energy of 7 TeV collected by the ATLAS detector. Events with two charged leptons, at least two jets and large missing transverse momentum are selected. Two observables are studied: A [ℓℓ over C] based on the identified charged leptons, and A[t[bar over t] over C], based on the reconstructed tt final state. The asymmetries are measured to be A[ℓℓ over C] = 0.024 ± 0.015(stat.) ± 0.009(syst.), A[t[bar over t] over C] = 0.021 ± 0.025(stat.) ± 0.017(syst.). The measured values are in agreement with the Standard Model predictions. United States. Dept. of Energy National Science Foundation (U.S.) Brookhaven National Laboratory |
|---|