Effective field theory for nonstandard top quark couplings

Nicolas Greiner, Scott Willenbrock, Cen Zhang

Research output: Contribution to journalArticlepeer-review


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 Û to bound the coefficient of the operator, and compare with the bound derived from top-quark decay.

Original languageEnglish (US)
Pages (from-to)218-222
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number3
StatePublished - Oct 13 2011

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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