Measurement of the charge asymmetry in dileptonic decays of top quark pairs in pp collisions at $$ \sqrt{s}=7 $$ TeV using the ATLAS detector
A measurement of the top-antitop (t$$\bar{t}$$) charge asymmetry is presented using data corresponding to an integrated luminosity of 4.6 fb -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: AC ℓℓ based on the identified charged leptons, and A$$t\bar{t}\atop{C}$$, based on the reconstructed tt final state. The asymmetries are measured to be A $$ℓℓ\atop{C}$$ =0.024 ± 0.015 (stat.) ± 0.009 (syst.), A $$t\bar{t}\atop{C}$$ = 0.021 ± 0.025 (stat.) ± 0.017 (syst.). The measured values are in agreement with the Standard Model predictions.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Organization:
- The ATLAS collaboration
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1407356
- Journal Information:
- Journal of High Energy Physics (Online), Vol. 2015, Issue 5; ISSN 1029-8479
- Publisher:
- Springer BerlinCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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