Optimal-observable analysis of possible non-standard top-quark couplings in pp→tt¯X→ℓ+X

Possible non-standard top-quark interactions with the gluon and the W boson induced by SU(3)×SU(2)×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 tt¯ produc...

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Bibliographic Details
Published inPhysics letters. B Vol. 716; no. 2; pp. 310 - 315
Main Authors Hioki, Zenrō, Ohkuma, Kazumasa
Format Journal Article
LanguageEnglish
Published Elsevier B.V 19.09.2012
Subjects
Anomalous couplings
Hadron colliders
Lepton distributions
Top productions
Top quark
Top quark
Lepton distributions
Anomalous couplings
Hadron colliders
Top productions
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Summary:Possible non-standard top-quark interactions with the gluon and the W boson induced by SU(3)×SU(2)×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 tt¯ productions at the Tevatron and the Large Hadron Collider (LHC). The optimal-observable procedure is applied to the charged-lepton distributions in pp→tt¯X→ℓ+X′ (ℓ=e or μ) 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.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2012.08.035