Abstract
We briefly review the global Standard Model fit to electroweak precision data, and discuss the status of electroweak constraints on new interactions. We follow a general effective Lagrangian approach to obtain model-independent limits on the dimension-six operators, as well as on several common new physics extensions.
Highlights
The measurement of the Higgs mass at the LHC [1, 2] provides a direct determination of the last of the Standard Model (SM) input parameters
Electroweak precision data has been crucial in testing the validity of the SM at the electroweak scale
The model predictions have been proved to the level of radiative corrections, finding a good agreement with data
Summary
The measurement of the Higgs mass at the LHC [1, 2] provides a direct determination of the last of the Standard Model (SM) input parameters. With this measurement the global SM fit to Electroweak Precision Data (EWPD) is overconstrained. From a theoretical and “aesthetic" point of view, on the other hand, it could be argued that the SM does not perform as well It has too many free parameters and it is unable to provide answers to several fundamental questions. The predictive power of the electroweak fit can be used to constrain the size of these new physics effects
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