Measurements of the charge asymmetry in top-quark pair production in the dilepton final state at √s = 8 TeV with the ATLAS detector
Measurements of the top-antitop quark pair production charge asymmetry in the dilepton channel, characterized by two high-p<sub>T</sub> leptons (electrons or muons), are presented using data corresponding to an integrated luminosity of 20.3 fb<sup>-1</sup> from pp collisions...
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| Autores principales: | , , , , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
2016
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/86773 |
| Aporte de: |
| Sumario: | Measurements of the top-antitop quark pair production charge asymmetry in the dilepton channel, characterized by two high-p<sub>T</sub> leptons (electrons or muons), are presented using data corresponding to an integrated luminosity of 20.3 fb<sup>-1</sup> from pp collisions at a center-of-mass energy √s = 8 TeV collected with the ATLAS detector at the Large Hadron Collider at CERN. Inclusive and differential measurements as a function of the invariant mass, transverse momentum, and longitudinal boost of the tt system are performed both in the full phase space and in a fiducial phase space closely matching the detector acceptance. Two observables are studied: A<sup>ℓℓ</sup><sub>C</sub> based on the selected leptons and ACtt based on the reconstructed tt final state. The inclusive asymmetries are measured in the full phase space to be A<sup>ℓℓ</sup><sub>C</sub>=0.008±0.006 and A<sup>tt</sup><sub>C</sub>=0.021±0.016, which are in agreement with the Standard Model predictions of A<sup>ℓℓ</sup><sub>C</sub>=0.0064±0.0003 and A<sup>tt</sup><sub>C</sub>=0.0111±0.0004. |
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