Physics Letters B (Sep 2014)

Final charged-lepton angular distribution and possible anomalous top-quark couplings in pp→tt¯X→ℓ+X′

  • Zenrō Hioki,
  • Kazumasa Ohkuma

DOI
https://doi.org/10.1016/j.physletb.2014.07.001
Journal volume & issue
Vol. 736, no. C
pp. 1 – 5

Abstract

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Possible anomalous (or nonstandard) top-quark interactions with the gluon and those with the W boson induced by SU(3)×SU(2)×U(1) gauge-invariant dimension-6 effective operators are studied in pp→tt¯X→ℓ+X′ (ℓ=e or μ) 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.

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