Precision electroweak constraints on the N=3 Lee-Wick standard model

Richard Lebed, Russell H. Terbeek

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4 Scopus citations

Abstract

The Lee-Wick (LW) formulation of higher-derivative theories can be extended from one in which the extra degrees of freedom are represented as a single, heavy, negative-norm partner for each known particle (N=2), to one in which a second, positive-norm partner appears (N=3). We explore the extent to which the presence of these additional states in a LW Standard Model affect precision electroweak observables, and find that they tend to have either a marginal effect (e.g., quark partners on T) or a substantial beneficial effect (e.g., Higgs partners on the Zbb̄ couplings). We find that precision constraints allow LW partners to exist in broad regions of mass parameter space accessible at the LHC, making LW theories a viable Beyond Standard Model candidate.

Original languageEnglish (US)
Article number015006
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume87
Issue number1
DOIs
Publication statusPublished - Jan 2 2013

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ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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