Abstract
We review the general analysis of the contributions of electroweak vacuum-polarization diagrams to precision experiments. We first review the representation of these contributions by three parameters , , and and discuss the assumptions involved in this reduction. We then discuss the contributions to these parameters from various models of new physics. We show that can be computed by a dispersion relation, and we use this technique to estimate in technicolor models of the Higgs sector. We discuss the reliability and the gauge invariance of this estimate. Finally, we present the limits on and imposed by current experimental results.
- Received 9 December 1991
DOI:https://doi.org/10.1103/PhysRevD.46.381
©1992 American Physical Society
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Physical Review D 50th Anniversary Milestones
This collection of seminal papers from PRD highlights research that remains central to developments today in particle physics, quantum field and string theory, gravitation, cosmology, and particle astrophysics.