Measurement of the charge asymmetry in top quark pair production in pp collisions at √s = 7 TeV using the ATLAS detector
A measurement of the top-antitop production charge asymmetry <i>A<sub>C</sub></i> is presented using data corresponding to an integrated luminosity of 1.04 fb<sup>−1</sup> of pp collisions at √s = 7 TeV collected by the ATLAS detector at the LHC. Events are select...
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| Autores principales: | , , , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
2012
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/79714 |
| Aporte de: |
| Sumario: | A measurement of the top-antitop production charge asymmetry <i>A<sub>C</sub></i> is presented using data corresponding to an integrated luminosity of 1.04 fb<sup>−1</sup> of pp collisions at √s = 7 TeV collected by the ATLAS detector at the LHC. Events are selected with a single lepton (electron or muon), missing transverse momentum and at least four jets of which at least one jet is identified as coming from a b-quark. A kinematic fit is used to reconstruct the t ̄t event topology. After background subtraction, a Bayesian unfolding procedure is performed to correct for acceptance and detector effects. The measured value of <i>A<sub>C</sub></i> is <i>A<sub>C</sub></i> = −0.019±0.028 (stat.)±0.024 (syst.), consistent with the prediction from the MC@NLO Monte Carlo generator of <i>A<sub>C</sub></i> = 0.006 ± 0.002. Measurements of <i>A<sub>C</sub></i> in two ranges of invariant mass of the top-antitop pair are also shown. |
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