Estimation of oblique electroweak corrections
Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields1992Vol. 46(1), pp. 381–409
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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 $S$, $T$, and $U$ 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 $S$ can be computed by a dispersion relation, and we use this technique to estimate $S$ in technicolor models of the Higgs sector. We discuss the reliability and the gauge invariance of this estimate. Finally, we present the limits on $S$ and $T$ imposed by current experimental results.
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