Supersymmetric contribution to the electroweak<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>ρ</mml:mi></mml:math>parameter

Drees, Manuel; Hagiwara, Kaoru

doi:10.1103/physrevd.42.1709

Cited by 121 publications

(127 citation statements)

References 83 publications

Supporting

Mentioning

127

Contrasting

Order By: Relevance

“…Of course, squark contributions are not the only supersymmetric corrections to ∆ρ. However, they are the only potentially large ones, when the present direct exclusion bounds are taken into account, and the other contributions have in general the same sign [78]. As the relative experimental accuracy for these quantities is 5×10 −4 and 7 × 10 −4 , respectively, it is easy to realize that the present sensitivity to ∆ρ is at the level of 1×10 −3 .…”

Section: Constraints From Electroweak Precision Testsmentioning

confidence: 80%

“…This universal contribution enters the Z 0 boson couplings and the relation between M W , G µ and α and is therefore significantly constrained by present data. Following the assumptions of section 2, the contribution of the squarks to ∆ρ = 1 − 1/ρ is given at one-loop order by the simple expression [77,78] 20) with the function F given by…”

Section: Constraints From Electroweak Precision Testsmentioning

confidence: 99%

See 1 more Smart Citation

ε′/ε and rare K and B decays in the MSSM

et al. 2001

View full text Add to dashboard Cite

We analyze the CP violating ratio ε ′ /ε and rare K and B decays in the MSSM with minimal flavour and CP violation, including NLO QCD corrections and imposing constraints on the supersymmetric parameters coming from ε, B 0 d,s −B 0 d,s mixings, B → X s γ, ∆̺ in the electroweak precision studies and from the lower bound on the neutral Higgs mass. We provide a compendium of phenomenologically relevant formulae in the MSSM. Denoting by T (Q) the MSSM prediction for a given quantity normalized to the Standard Model result we find the ranges: 0.53We point out that these ranges will be considerably reduced when the lower bounds on the neutral Higgs mass and tan β improve. Some contour plots illustrate the dependences of the quantities above on the relevant supersymmetric parameters. As a byproduct of this work we update our previous analysis of ε ′ /ε in the SM and find in NDR ε ′ /ε = (9.2 +6.8 −4.0 ), a value 15% higher than in our 1999 analysis.

show abstract

Section: Constraints From Electroweak Precision Testsmentioning

confidence: 80%

Section: Constraints From Electroweak Precision Testsmentioning

confidence: 99%

ε′/ε and rare K and B decays in the MSSM

et al. 2001

View full text Add to dashboard Cite

show abstract

“…• R-Higgs sector: the contributions from the R-Higgs sector have a structure similar to the stop-sbottom contribution [74],…”

Section: To Fulfill the Tree-level Tadpole Equations Is Given Asmentioning

confidence: 99%

Higgs boson mass and electroweak observables in the MRSSM

Diessner

Kalinowski

Kotlarski

et al. 2014

J. High Energ. Phys.

159

View full text Add to dashboard Cite

R-symmetry is a fundamental symmetry which can solve the SUSY flavor problem and relax the search limits on SUSY masses. Here we provide a complete next-toleading order computation and discussion of the lightest Higgs boson mass, the W boson mass and muon decay in the minimal R-symmetric SUSY model (MRSSM). This model contains non-MSSM particles including a Higgs triplet, Dirac gauginos and higgsinos, and leads to significant new tree-level and one-loop contributions to these observables. We show that the model can accommodate the measured values of the observables for interesting regions of parameter space with stop masses of order 1 TeV in spite of the absence of stop mixing. We characterize these regions and provide typical benchmark points, which are also checked against further experimental constraints. A detailed exposition of the model, its mass matrices and its Feynman rules relevant for computations in this paper is also provided.

show abstract

“…With such an operator one can achieve a first-order electroweak phase transition [30] that may be relevant for the problem of baryogenesis. It was shown that one needs f √ c 6 > 550 GeV (35) to ensure that the expansion of the universe does not disallow percolation of bubbles of metastable vacuum. This corresponds to c 6 ξ < 0.2.…”

Section: Higher-dimensional Operators and Composite Modelsmentioning

confidence: 99%

How well do we need to measure the Higgs boson mass and self-coupling?

2013

View full text Add to dashboard Cite

Much of the discussion regarding future measurements of the Higgs boson mass and self-coupling is focussed on how well various collider options can do. In this article we ask a physics-based question of how well do we need colliders to measure these quantities to have an impact on discovery of new physics or an impact in how we understand the role of the Higgs boson in nature. We address the question within the framework of the Standard Model and various beyond the Standard Model scenarios, including supersymmetry and theories of composite Higgs bosons. We conclude that the LHC's stated ability to measure the Higgs boson to better than 150 MeV will be as good as we will ever need to know the Higgs boson mass in the foreseeable future. On the other hand, we estimate that the self-coupling will likely need to be measured to better than 20% to see a deviation from the Standard Model expectation. This is a challenging target for future collider and upgrade scenarios.

show abstract

Supersymmetric contribution to the electroweakρparameter

Cited by 121 publications

References 83 publications

ε′/ε and rare K and B decays in the MSSM

ε′/ε and rare K and B decays in the MSSM

Higgs boson mass and electroweak observables in the MRSSM

How well do we need to measure the Higgs boson mass and self-coupling?

Contact Info

Product

Resources

About