Effective Field Theory for Nonstandard Top Quark Couplings

Abstract

We present an effective-field-theory calculation of the effect of a dimension-six operator involving the top quark on precision electroweak data via a top-quark loop. We demonstrate the renormalizability, in the modern sense, of the effective field theory. We use the oblique parameter U to bound the coefficient of the operator, and compare with the bound derived from top-quark decay.

10 pages, 3 figures

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• A global fit of top quark effective theory to data
• The electro-weak couplings of the top and bottom quarks -- global fit and future prospects
• Effective field theory approach to top-quark decay at next-to-leading order in QCD
• Constraints on Non-standard Top Quark Couplings
• Dimension-six electroweak top-loop effects in Higgs production and decay
• Top effective operators at the ILC
• Top quark decay at next-to-leading order in the Standard Model Effective Field Theory
• Probing top quark neutral couplings in the Standard Model Effective Field Theory at NLO QCD
• Up Asymmetries From Exhilarated Composite Flavor Structures
• Learning to pinpoint effective operators at the LHC: a study of the $t\bar{t}b\bar{b}$ signature
• The Feynman rules for the SMEFT in the background field gauge
• Effective Field Theory in the top sector: do multijets help?
• Effective Field Theory of Precision Electroweak Physics at One Loop
• MEtop - a generator for single top production via FCNC interactions
• New physics contributions to the forward-backward asymmetry at the Tevatron
• Determining Top Quark Couplings at the LHC: Snowmass White Paper
• Top quark physics in the Large Hadron Collider era
• Staying on Top of SMEFT-Likelihood Analyses
• New physics in top decay