Disguising the oblique parameters
- Service de Physique Theorique, CEA Saclay, F-91191 Gif-sur-Yvette (France)
- Department of Physics, Yale University, New Haven, Connecticut 06520 (United States)
- Department of Physics, University of California, Davis, California 95616 (United States)
We point out a set of operator identities that relate the operators corresponding to the oblique corrections to operators that modify fermion couplings to the gauge bosons as well as operators that modify triple gauge boson couplings. Such identities are simple consequences of the equations of motion. Therefore the contributions from new physics to the oblique parameters can be disguised as modifications of triple gauge boson couplings provided the fermion couplings to the gauge bosons are suitably modified by higher-dimensional operators. Since the experimental constraints on triple gauge boson couplings are much weaker than the constraints on the oblique parameters this observation allows extra room for model building. We derive operator relations in effective theories of the standard model with the electroweak symmetry either linearly or nonlinearly realized and discuss applications of our results.
- OSTI ID:
- 20782839
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 73, Issue 7; Other Information: DOI: 10.1103/PhysRevD.73.075008; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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