Patterns of Deviation from the Standard Model

Details Patterns of Deviation from the Standard Model Patterns of Deviation from the Standard Model

1994-05-03

arxiv.org/abs/hep-ph/9405214v5

Nucl.Phys. B433 (1995) 41-66

Physics

High Energy Physics

High Energy Physics - Phenomenology

37 pages, UM-TH-94-15. Four figures and one table are embedded in text. This file requires as inputs epsf.tex and the IAS vers

Scientific paper

10.1016/0550-3213(94)00336-D

Effective Lagrangians can be used to parametrize the effects of physics beyond the standard model. Assuming the complete theory is a gauge theory, we determine which effective operators may be generated at tree level, and which are only generated at loop level. The latter are be suppressed by factors of $1/ 16\pi^2$ and will therefore be quite difficult to detect. In particular, all operators changing the Standard-Model structure of the triple-gauge-vector couplings fall into this category. We also point out that in certain cases, dimension-eight operators may be more important than dimension-six operators. We discuss both the linear and non-linear representation of the Higgs sector.

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