# QCD Corrections from Top Quark to Relations between Electroweak Parameters to Order α 2 s †

@inproceedings{Chetyrkin1995QCDCF, title={QCD Corrections from Top Quark to Relations between Electroweak Parameters to Order $\alpha$ 2 s †}, author={K. Chetyrkin and Johann H. K{\"u}hn and Matthias Steinhauser}, year={1995} }

The vacuum polarization functions Π(q2) of charged and neutral gauge bosons which arise from top and bottom quark loops lead to important shifts in relations between electroweak parameters which can be measured with ever-increasing precision. The large mass of the top quark allows approximation of these functions through the first two terms of an expansion in M2 Z/M 2 t . The first three terms of the Taylor series of Π(q2) are evaluated analytically up to order αs. The first two are required to… Expand

#### 19 Citations

Top-quark pole mass in the tadpole-free $\overline {MS}$ scheme

- Physics
- 2016

The complex pole mass of the top quark is presented at full two-loop order in the Standard Model, augmenting the known four-loop QCD contributions. The input parameters are the MS-bar Yukawa and… Expand

Higher-order electroweak corrections to the partial widths and branching ratios of the Z boson

- Physics
- 2014

A bstractRecently, the calculation of fermionic electroweak two-loop corrections to the total width of the Z boson and hadronic Z-peak cross-section in the Standard Model has been presented, where… Expand

Matching relations for decoupling in the Standard Model at two loops and beyond

- Physics
- 2019

I discuss the matching relations for the running renormalizable parameters when the heavy particles (top quark, Higgs scalar, Z and W vector bosons) are simultaneously decoupled from the Standard… Expand

CPP-1461 TTP / TTP 14-025 Alberta Thy 14-14 O ( α 2 s ) corrections to the running top-Yukawa coupling and the mass of the lightest Higgs boson in the MSSM

O(α 2 s) corrections to the running top-Yukawa coupling and the mass of the lightest Higgs boson in the MSSM Abstract In this paper we propose a method to compute the running top-Yukawa coupling in… Expand

M ay 2 01 5 Z boson pole mass at two-loop order in the pure MS scheme

- 2015

X iv :1 50 5. 04 83 3v 1 [ he pph ] 1 8 M ay 2 01 5 Z boson pole mass at two-loop order in the pure MS scheme Stephen P. Martin Department of Physics, Northern Illinois University, DeKalb IL 60115,… Expand

Phenomenological indications of the scale of supersymmetry

- Physics
- 2006

Electroweak precision measurements can provide indirect information about the possible scale of supersymmetry already at the present level of accuracy. We update the present-day sensitivities of… Expand

Precise prediction for the W boson mass in the MRSSM

- Physics
- 2019

A bstractThe mass of the W boson, MW, plays a central role for high-precision tests of the electroweak theory. Confronting precise theoretical predictions with the accurately measured experimental… Expand

Pole mass of the W boson at two-loop order in the pure $\overline {MS}$ scheme

- Physics
- 2015

I provide a calculation at full two-loop order of the complex pole squared mass of the W boson in the Standard Model in the pure MS-bar renormalization scheme, with Goldstone boson mass effects… Expand

Implications of LHC search results on the W boson mass prediction in the MSSM

- Physics
- 2013

A bstractWe present the currently most precise W boson mass (MW) prediction in the Minimal Supersymmetric Standard Model (MSSM) and discuss how it is affected by recent results from the LHC. The… Expand

Improved prediction for the mass of the W boson in the NMSSM

- Physics
- 2015

A bstractElectroweak precision observables, being highly sensitive to loop contributions of new physics, provide a powerful tool to test the theory and to discriminate between different models of the… Expand