scholarly journals Higher-order corrections in the SM Higgs sector: the right scale

1996 ◽  
Vol 51 (3) ◽  
pp. 88-93
Author(s):  
Kurt Riesselmann
Keyword(s):  
Higgs Sector ◽  
Higher Order ◽  
The Right ◽  
Higher Order Corrections

scholarly journals STATUS OF HIGHER-ORDER CORRECTIONS IN THE STANDARD ELECTROWEAK THEORY

1995 ◽  
Vol 10 (04) ◽  
pp. 443-464 ◽  
Author(s):  
BERND A. KNIEHL
Keyword(s):  
Standard Model ◽  
Higgs Sector ◽  
Higher Order ◽  
Threshold Effects ◽  
Electroweak Theory ◽  
Radiative Corrections ◽  
Gauge Sector ◽  
The Standard Model ◽  
Text Mode ◽  
Higher Order Corrections

We review recent theoretical progress in the computation of radiative corrections beyond one loop within the standard model of electroweak interactions, in both the gauge and Higgs sectors. In the gauge sector, we discuss universal corrections of [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text], and those due to virtual [Formula: see text]-threshold effects, as well as specific corrections to [Formula: see text] of [Formula: see text], [Formula: see text] and [Formula: see text] including finite-mb effects. We also present an update of the hadronic contributions to Δα. Theoretical uncertainties, other than those due to the lack of knowledge of MH and mt, are estimated. In the Higgs sector, we report on the [Formula: see text] corrections to [Formula: see text] including those which are specific for the [Formula: see text] mode, the [Formula: see text] corrections to [Formula: see text] including the finite-mq terms, and the [Formula: see text] corrections to Γ(H → gg).

scholarly journals Towards Higgs masses and decay widths satisfying the symmetries in the (N)MSSM

2020 ◽  
Vol 80 (12) ◽  
Author(s):  
Florian Domingo ◽  
Sebastian Paßehr
Keyword(s):  
Higgs Sector ◽  
Higher Order ◽  
Loop Order ◽  
Gauge Dependence ◽  
Higher Order Terms ◽  
Gauge Fixing ◽  
Intuitive Concept ◽  
Definition Of ◽  
Higher Order Corrections ◽  
Extended Higgs Sector

AbstractIn models with an extended Higgs sector, such as the (N)MSSM, scalar states mix with one another. Yet, the concept of Higgs mixing is problematic at the radiative level, since it introduces both a scheme and a gauge dependence. In particular, the definition of Higgs masses and decay amplitudes can be impaired by the presence of gauge-violating pieces of higher order. We discuss in depth the origin and magnitude of such effects and consider two strategies that minimize the dependence on the gauge-fixing parameter and field-renormalization of one-loop order in the definition of the mass and decay observables, both in degenerate and non-degenerate scenarios. In addition, the intuitive concept of mixing and the simplicity of its definition in terms of two-point diagrams can make it tempting to include higher-order corrections on this side of the calculation, irrespectively of the order achieved in vertex diagrams. Using the global $$SU(2)_{\mathrm{L}}$$ S U ( 2 ) L -symmetry in the decoupling limit, we show that no improvement can be expected from such an approach at the level of the Higgs decays, but that, on the contrary, the higher-order terms may lead to numerically large spurious effects.

Some applications of the revisited approximate next-to-leading higher order corrections in QCD

2015 ◽  
Vol 30 (11) ◽  
pp. 1550047
Author(s):  
N. Mebarki ◽  
M. R. Bekli ◽  
H. Aissaoui
Keyword(s):  
Higher Order ◽  
Higher Order Corrections

Using the prescription and techniques of the soft and/or collinear gluon approach developed in Refs. 1–5 and revisited in Ref. 6, applications to some hadronic subprocesses are considered and approximate QCD higher order contributions are determined.

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