Effective theory analysis of precision electroweak data

Effective Theory Analysis of Precision Electroweak Data

We obtain the bounds on arbitrary linear combinations of operators of dimension 6 in the Standard Model. We consider a set of 21 flavor and CP conserving operators. Each of our 21 operators is tightly constrained by the standard set of electroweak measurements. We perform a fit to all relevant precision electroweak data and include neutrino scattering experiments, atomic parity violation, W mas...

Electroweak Theory and the 1996/97 Precision Electroweak Data * †

We review the empirical evidence for the validity of the Standard Electroweak Theory in Nature. The experimental data are interpreted in terms of an effective Lagrangian for Z physics, allowing for potential sources of SU(2) violation and containing the predictions of the Standard Electroweak Theory as a special case. Particular emphasis is put on discriminating loop corrections due to fermion-...

Refined Analysis of the Electroweak Precision Data †

We refine our recent analysis of the electroweak precision data at the Z pole by including the hadronic decay modes of the Z. Within the framework of an effective Lagrangian we parametrize SU(2) violation by the additional process-specific parameters ∆yν , ∆yh, and ∆yb (for the Z νν̄, Zqq̄, and Zbb̄ vertices) together with the previously introduced parameters ∆x, ∆y, and ε. We find that a six-para...

Theory of Precision Electroweak Measurements

Electroweak Precision Data Global Higgs Analysis

The status of published and preliminary precision electroweak measurements as of winter 2002/03 is presented. The new results on the mass of the W boson as measured at LEP-2 and on atomic parity violation in Caesium are included. The experimental results are compared with the predictions of the minimal Standard Model and are used to constrain its parameters, including the mass of the Higgs boso...