Final charged-lepton angular distribution and possible anomalous top-quark couplings in p p -> t tbar X -> l^+ X'

Abstract

Possible anomalous (or nonstandard) top-quark interactions with the gluon and those with the W boson induced by SU(3) x SU(2) x U(1) gauge-invariant dimension-6 effective operators are studied in p p -> t tbar X -> l^+ X' (l=e or mu) at the Large Hadron Collider (LHC). The final charged-lepton (l^+) angular distribution is first computed for nonvanishing nonstandard top-gluon and top-W couplings with a cut on its transverse momentum. The optimal-observable procedure is then applied to this distribution in order to estimate the expected statistical uncertainties in measurements of those couplings that contribute to this process in the leading order.

latex_2e, 14 pages, 4 eps figures

References in corpus (18)

• Dimension-Six Terms in the Standard Model Lagrangian
• Implications of CTEQ global analysis for collider observables
• A minimal set of top anomalous couplings
• Patterns of Deviation from the Standard Model
• A minimal set of top-Higgs anomalous couplings
• Determining the top-antitop and $ZZ$ Couplings of a Neutral Higgs Boson of Arbitrary CP Nature at the NLC
• Anomalous Wtb coupling effects in the weak radiative B-meson decay
• Lepton distribution as a probe of new physics in production and decay of the t quark and its polarization
• New Hints for Testing Anomalous Top-Quark Interactions at Future Linear Colliders
• Effect of anomalous tbW vertex on decay-lepton distributions in e+e- -> t tbar and CP-violating asymmetries
• Search for anomalous top-gluon couplings at LHC revisited
• Decoupling of Anomalous Top-Quark-Decay Vertices in Angular Distribution of Secondary Particles
• Latest constraint on non-standard top-gluon couplings at hadron colliders and its future prospect
• Angular Distribution of Leptons in General ttbar Production and Decay
• Exploring anomalous top interactions via the final lepton in ttbar productions/decays at hadron colliders
• Optimal-observable Analysis of Possible Non-standard Top-quark Couplings in pp -> t t-bar X -> l^+ X'
• Addendum to: Search for anomalous top-gluon couplings at LHC revisited
• Longitudinal top polarisation measurement and anomalous $Wtb$ coupling

Cited by in corpus (4)

• A set of top quark spin correlation and polarization observables for the LHC: Standard Model predictions and new physics contributions
• Probing heavy charged fermions at $e^{+}{e}^{-}$ collider using the Optimal Observable Technique
• Full analysis of general non-standard tbW couplings
• Optimal determination of New Physics couplings: A comparative study