Electroweak Precision Data and New Gauge Bosons
نویسنده
چکیده
I review constraints on the Standard Model (SM) Higgs boson from high energy electroweak (EW) precision data. The same data set also strongly limits various mixing effects of hypothetical extra neutral gauge bosons (Z′) with the ordinary Z. I also discuss low energy precision measurements which are sensitive to other aspects of Z′ physics, such as the direct exchange amplitude and the flavor or CP violating sectors.
منابع مشابه
Precision Bounds on Flavor Gauge Bosons
Gauged flavor symmetries at low energies have been proposed in models of dynamical electroweak symmetry breaking and fermion mass generation. The massive flavor gauge bosons give rise to corrections to precisely measured electroweak quantities. We perform a fit to the Z-pole electroweak data and place indirect limits on such new physics. In particular we study several models from the literature...
متن کاملLimits on the Ununified Standard Model
The ununified standard model is an extension of the standard model that contains separate electroweak gauge groups for quarks and leptons. When it was originally proposed, data allowed the new gauge bosons to be quite light. We use recent data from precision electroweak measurements to put stringent bounds on the ununified standard model. In particular, at the 95% confidence level, we find that...
متن کاملPrecision Electroweak Constraints on Top-Color Assisted Technicolor
Using precision electroweak data, we put limits on “natural” top-color assisted technicolor models. Generically the new U(1) gauge bosons in these models must have masses larger than roughly 2 TeV, although in certain (seemingly unrealistic) models the bound can be much lower. ∗e-mail addresses: [email protected], [email protected]
متن کاملar X iv : h ep - p h / 96 06 23 3 v 1 4 J un 1 99 6 Precision Electroweak Constraints on Top - Color Assisted
Using precision electroweak data, we put limits on " natural " top-color assisted technicolor models. Generically the new U (1) gauge bosons in these models must have masses larger than roughly 2 TeV, although in certain (seemingly unrealistic) models the bound can be much lower.
متن کاملBounds on Flavor Gauge Bosons from precision Electroweak Data
Gauged flavor symmetries at low energies have been proposed in models of dynamical electroweak symmetry breaking and fermion mass generation. The massive flavor gauge bosons give rise to corrections to precisely measured electroweak quantities. We perform a fit to the collider electroweak data and place indirect limits on such new physics. In particular we study several models from the literatu...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2009