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- W1553399302 abstract "In this thesis the charge asymmetry of the dileptonic (e,mu) channel decay of top quark pair is presented, which is studied in proton-proton collisions at sqrt(s) = 7 TeV, using data corresponding to an integrated luminosity of 4.5 fb^(-1) collected by the ATLAS detector. The final products of this experiment are exactly two leptons, which are one muon and one electron, two jets, where at least one of them is a b-jet, and the missing energy, consisting of the energy of the lepton-neutrinos. The two observed charge asymmetries in the top quark pair are: top quark-based and lepton-based. Measuring the top quark-based asymmetry in the ATLAS experiment in the pp collisions does not lead to an accurate result, however, the obtained result based on the ttbar rapidities is calculated as:A_ttbar = −0.036 ± 0.014This value is measured while the predicted Monte-Carlo result is: 0.0005 ± 0.0029 for the same calculation. The lepton-based charge asymmetry measurement that is more common in the ATLAS experiment, is calculated based on the pseudorapidity of the final (e,mu) leptons. The lepton-based charge asymmetry yields the result as:A_ll = 0.007 ± 0.014while the MC predictions give the result of the same measurement as: 0.006 ± 0.0029 All the obtained experimental results in the ttbar-based asymmetry and the lepton-based asymmetry, with some uncertainty corrections, match the MC predictions, which implies clearly that there is no evidence of breaking the physics of the Standard Model in this experiment." @default.
- W1553399302 created "2016-06-24" @default.
- W1553399302 creator A5085376689 @default.
- W1553399302 date "2014-01-01" @default.
- W1553399302 modified "2023-09-26" @default.
- W1553399302 title "Measurement of the charge asymmetry in top quark pair decay in dilepton (e,mu) channel in pp collision data at √ s = 7 TeV using the ATLAS detector" @default.
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