# Renormalization group constraints on new top interactions from electroweak precision data

@article{Blas2015RenormalizationGC, title={Renormalization group constraints on new top interactions from electroweak precision data}, author={Jorge de Blas and Mikael Chala and Jos{\'e} Mar{\'i}a Cerver{\'o} Santiago}, journal={Journal of High Energy Physics}, year={2015}, volume={2015}, pages={1-15} }

A bstractAnomalous interactions involving the top quark contribute to some of the most difficult observables to directly access experimentally. They can give however a sizeable correction to very precisely measured observables at the loop level. Using a model-independent effective Lagrangian approach, we present the leading indirect constraints on dimension-six effective operators involving the top quark from electroweak precision data. They represent the most stringent constraints on these…

## 48 Citations

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Abstract
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## References

SHOWING 1-10 OF 91 REFERENCES

Constraints on electroweak effective operators at one loop

- Physics
- 2013

We derive bounds on nine dimension-six operators involving electroweak gauge bosons and the Higgs boson from precision electroweak data. Four of these operators contribute at tree level, and five…

Electroweak constraints on new physics

- Physics
- 2011

We briefly review the limits on new interactions implied by electroweak precision data. Special attention is payed to the bounds on the Higgs boson mass. We also comment on the required cancellation…

Effective theory analysis of precision electroweak data

- Physics
- 2005

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…

Effective approach to top-quark decay and FCNC processes at NLO accuracy

- Physics
- 2014

The top quark is expected to be a probe to new physics beyond the standard model. Thanks to the large number of top quarks produced at the Tevatron and the LHC, various properties of the top quark…

Probing top-Higgs non-standard interactions at the LHC

- Physics
- 2012

A bstractEffective interactions involving both the top quark and the Higgs field are among the least constrained of all possible (gauge invariant) dimension-six operators in the Standard Model. Such…

Electroweak two-loop corrections to the effective weak mixing angle

- Physics, Mathematics
- 2006

Recently exact results for the complete electroweak two-loop contributions to the effective weak mixing angle were published. This paper illustrates the techniques used for this computation, in…

Precision Electroweak Measurements and Constraints on the Standard Model

- Physics
- 2009

This note presents constraints on Standard Model parameters using published and preliminary precision electroweak results measured at the electron-positron colliders LEP and SLC. The results are…

Higgs windows to new physics through d = 6 operators: constraints and one-loop anomalous dimensions

- Physics
- 2013

A bstractThe leading contributions from heavy new physics to Higgs processes can be captured in a model-independent way by dimension-six operators in an effective Lagrangian approach. We present a…

Global approach to top-quark flavor-changing interactions

- Physics
- 2015

We adopt a fully gauge-invariant effective-field-theory approach for parametrizing top-quark flavor-changing-neutral-current interactions. It allows for a global interpretation of experimental…

Electroweak constraints on flavorful effective theories

- Physics
- 2015

A bstractWe derive model-independent constraints arising from the Z and W boson observables on dimension six operators in the effective theory beyond the Standard Model. In particular, we discuss the…