Optimal-observable Analysis of Possible Non-standard Top-quark Couplings in pp -> t t-bar X -> l^+ X'
arXiv:1206.2413 · doi:10.1016/j.physletb.2012.08.035
Abstract
Possible non-standard top-quark interactions with the gluon and the W boson induced by SU(3) X SU(2) X U(1) gauge-invariant dimension-6 effective operators are studied for hadron-collider experiments. Current limits on top-gluon couplings are presented by using the latest experimental data of t t-bar productions at the Tevatron and the Large Hadron Collider (LHC). The optimal-observable procedure is applied to the charged-lepton distributions in p p -> t t-bar X -> l^+ X' (l = e or mu) at the LHC in order to estimate the expected statistical uncertainties in measurements of those non-standard top-gluon and top-W couplings that contribute to this process in the leading order.
16 pages, 1 figure, Discussion of stabilities in estimating statistical errors and related one reference added. Final version (to appear in Phys. Lett. B)
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