Oblique electroweak corrections from heavy scalar fields
نویسندگان
چکیده
منابع مشابه
Estimation of oblique electroweak corrections.
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 d...
متن کاملThe Oblique Corrections from Heavy Scalars in Irreducible Representations
In spite of its tremendous success, the standard model (SM) has several drawbacks. The Higgs particle has not yet been found in experiments; on the other hand, the SM suffers unnaturalness and triviality from a theoretical point of view. Thus, the SM may not be correct, or at least it is just an effective theory at the electroweak scale. There are many new physics possibilities beyond the SM. A...
متن کاملOblique electroweak corrections and triple vector boson couplings
We relate all C– and P–invariant anomalous triple vector–boson couplings to the oblique electroweak parameters. LEP constraints on the latter then yield the strongest and most general simultaneous bounds to date on the former. Even if the oblique parameters assume their Standard Model values precisely, these bounds would not shrink to zero—thus underscoring the need for direct experimental prob...
متن کاملElectroweak symmetry breaking in supersymmetric models with heavy scalar superpartners
We propose a novel mechanism of electroweak symmetry breaking in supersymmetric models, as the one recently discussed by Birkedal, Chacko and Gaillard, in which the Standard Model Higgs doublet is a pseudo-Goldstone boson of some global symmetry. The Higgs mass parameter is generated at one loop level by two different, moderately fine-tuned sources of the global symmetry breaking. The mechanism...
متن کاملElectroweak Radiative Corrections
A new framework to study electroweak physics at one-loop level in general SU(2)L ×U(1)Y theories is introduced. It separates the 1-loop corrections into two pieces: process specific ones from vertex and box contributions and the universal ones due to contributions to the gauge boson propagators. The latter are parametrized in terms of four effective form factors, ē(q), s̄(q), ḡ Z(q ), and ḡ W (q...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Zeitschrift für Physik C Particles and Fields
سال: 1993
ISSN: 0170-9739,1434-6052
DOI: 10.1007/bf01557712