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: | en_US |
| Published: |
Springer-Verlag
2015
|
| Online Access: | http://hdl.handle.net/1721.1/98200 https://orcid.org/0000-0002-7586-7253 |
| 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. |
|---|