TY - JOUR
T1 - Precision electroweak constraints on the N=3 Lee-Wick standard model
AU - Lebed, Richard
AU - Terbeek, Russell H.
PY - 2013/1/2
Y1 - 2013/1/2
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevD.87.015006
DO - 10.1103/PhysRevD.87.015006
M3 - Article
AN - SCOPUS:84871911893
SN - 1550-7998
VL - 87
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 1
M1 - 015006
ER -