Electroweak precision observables, new physics and the nature of a 126 GeV Higgs boson

By Marco Ciuchini, E. Franco, S. Mishima, L. Silvestrini. 2013

162 citations recorded by the source corpus.

A bstractWe perform the fit of electroweak precision observables within the Standard Model with a 126 GeV Higgs boson, compare the results with the theoretical predictions and discuss the impact of recent experimental and theoretical improvements. We introduce New Physics contributions in a model-independent way and fit for the S, T and U parameters, for the ϵ1,2,3,b ones, for modified $ Zb\overline{b} $ couplings and for a modified Higgs coupling to vector bosons. We point out that composite Higgs models are very strongly constrained. Finally, we compute the bounds on dimension-six operators relevant for the electroweak fit.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/5bb8ec2f85bb997e80c646f0927e694a0d1959ec

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. T. Stefaniak
2. Georg Weiglein
3. Oscar Stål
4. Sven Heinemeyer
5. J. Blas
6. Florian Staub

In Nuclear and High Energy Physics

1. T. Stefaniak
2. Oscar Stål
3. Georg Weiglein
4. Sven Heinemeyer
5. Philip Bechtle
6. Florian Staub
7. J. Blas
8. Laura Reina

Citations in the corpus

• Probing the Standard Model with Higgs signal rates from the Tevatron, the LHC and a future ILC (2014, methodology): “custodial symmetry Experimentally, deviations from the custodial global SU(2) symmetry are strongly constrained by the oblique (Peskin-Takeuchi) Tparameter [128,129] obtained in global electroweak ts [130,131]. Nevertheless, as an independent and complementary test, it is important to investigate th”
• Electroweak precision observables and Higgs-boson signal strengths in the Standard Model and beyond: present and future (2016, methodology): “nt for NP eects in the vacuum-polarization amplitudes of the EW gauge bosons and modify all EWPO considered here. The explicit dependence of the EWPO on S, T, and Ucan be found in appendix A of ref. [3] where it was also noticed how the EWPO considered here depend only on the following three specic ”