Top quark and leptonic charge asymmetries for the Tevatron and LHC

By W. Bernreuther, Zong-Guo Si. 2012

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We compute, for $t \bar t$ production at the LHC and at the Tevatron, several charge asymmetries to NLO QCD, including also the electromagnetic and weak-interaction corrections. We calculate these asymmetries both inclusively and with additional kinematic cuts and compare our results, where possible, with recent experimental results and with SM predictions. The $t \bar t$ asymmetries induce also corresponding asymmetries for the charged leptons from semileptonic top-quark decay. Although these asymmetries are, in the SM, smaller than the corresponding ones for top quarks, they are expected to be measurable quite precisely. In fact, measurement of a lepton asymmetry in $\ell$ + jets events was reported by the D$\emptyset$ and CDF experiments. We analyze and compute to NLO in the gauge couplings leptonic charge asymmetries for dileptonic and semileptonic $\ttbar$ events, with and without acceptance cuts, at the Tevatron and the LHC.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/6719eafbe2ab59f56a6a73e69785786caec4b38d

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In Nuclear and High Energy Physics

Citations in the corpus

NLO QCD corrections to off-shell top-antitop production with leptonic decays at hadron colliders (2012, unknown): “[103].”
Constraining top quark effective theory in the LHC Run II era (2015, methodology): “In the case of AC, we normalise the small (but non-zero) LO QCD piece, to the NLO prediction, which has been calculated with a Monte Carlo and cross-checked with a dedicated NLO calculation [139].”