Update of the electroweak precision fit, interplay with Higgs-boson signal strengths and model-independent constraints on new physics

Abstract

We present updated global fits of the Standard Model and beyond to electroweak precision data, taking into account recent progress in theoretical calculations and experimental measurements. From the fits, we derive model-independent constraints on new physics by introducing oblique and epsilon parameters, and modified $Zb\bar{b}$ and $HVV$ couplings. Furthermore, we also perform fits of the scale factors of the Higgs-boson couplings to observed signal strengths of the Higgs boson.

7 pages, 9 figures. Proceedings of the 37th International Conference on High Energy Physics (ICHEP2014), Valencia, Spain, 2-9 July 2014. v2: a reference added

References in corpus (9)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• The global electroweak fit at NNLO and prospects for the LHC and ILC
• Measurement of the Higgs boson mass from the $H\to \gamma \gamma$ and $H\to Z{Z}^{\ast }\to 4\ell$ channels with the ATLAS detector using 25 fb${}^{-1}$ of $pp$ collision data
• The Higgs boson from an extended symmetry
• Symmetries, Sum Rules and Constraints on Effective Field Theories
• Disguising the Oblique Parameters
• Precision determination of the top-quark mass
• Electroweak precision tests in the LHC era and Z-decay form factors at two-loop level
• Tests of the Electroweak Standard Model

Cited by in corpus (3)

• SMEFT analysis of vector boson scattering and diboson data from the LHC Run II
• Constraining Higgs boson effective couplings at electron-positron colliders
• How to use the Standard Model effective field theory