Three-loop electroweak correction to the rho parameter in the large Higgs mass limit

Boughezal, Radja; Tausk, J.B.; Bij, J.J. van der

doi:10.1016/j.nuclphysb.2005.02.020

Cited by 69 publications

(70 citation statements)

References 26 publications

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“…contributions containing two fermion loops) [13]. Recently, the leading three-loop contributions to the ρ parameter of O(G [15] have been computed.…”

Section: Introductionmentioning

confidence: 99%

Electroweak two-loop corrections to the effective weak mixing angle

Awramik¹,

Czakon²,

Freitas³

2006

J. High Energy Phys.

139

234

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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 particular the methods for evaluating the loop diagrams and the proper definition of Z-pole observables at next-to-next-to-leading order. Numerical results are presented in terms of simple parametrization formulae and compared in detail with a previous result of an expansion up to next-to-leading order in the top-quark mass. Finally, an estimate of the remaining theoretical uncertainties from unknown higher-order corrections is given. * email: Malgorzata.Awramik@desy.de †

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“…contributions containing two fermion loops) [13]. Recently, the leading three-loop contributions to the ρ parameter of O(G [15] have been computed.…”

Section: Introductionmentioning

confidence: 99%

Electroweak two-loop corrections to the effective weak mixing angle

Awramik¹,

Czakon²,

Freitas³

2006

J. High Energy Phys.

139

234

View full text Add to dashboard Cite

show abstract

“…Within the SM, the complete one-loop [11] and two-loop [12][13][14][15][16] results are known as well as leading higher-order contributions [17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Precise prediction forM_Win the MSSM

Heinemeyer

Hollik

Stöckinger

et al. 2006

J. High Energy Phys.

186

233

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We present the currently most accurate evaluation of the W boson mass, M W , in the Minimal Supersymmetric Standard Model (MSSM). The full complex phase dependence at the one-loop level, all available MSSM two-loop corrections as well as the full Standard Model result have been included. We analyse the impact of the different sectors of the MSSM at the one-loop level with a particular emphasis on the effect of the complex phases. We discuss the prediction for M W based on all known higher-order contributions in representative MSSM scenarios. Furthermore we obtain an estimate of the remaining theoretical uncertainty from unknown higher-order corrections. * email: Sven.Heinemeyer@cern.ch †

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“…(2.16) we see that a special case occurs when κ 2 = κ 1 , giving Br s (ZZ/W W ) = 1/2, similar to that of h 0 1 . However, in this case we have 14) up to corrections due to the mass of the Z boson. By considering all four partial widths into the electroweak bosons it is still possible to distinguish a singlet scalar from the Higgs doublet even in this special case.…”

Section: Partial Widths Ofmentioning

confidence: 99%

“…However, it is well known that φ and Φ individually violate the custodial symmetry and leads to unacceptably large corrections to the ρ parameter unless the VEV is extremely small, on the order of a few GeV [13][14][15]. For a singlet scalar s, the sV 1 V 2 couplings do not come from the Higgs mechanism.…”

Section: Jhep10(2010)053mentioning

confidence: 99%

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Revealing the electroweak properties of a new scalar resonance

Low

Lykken

2010

J. High Energ. Phys.

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One or more new heavy resonances may be discovered in experiments at the CERN Large Hadron Collider. In order to determine if such a resonance is the long-awaited Higgs boson, it is essential to pin down its spin, CP , and electroweak quantum numbers. Here we describe how to determine what role a newly-discovered neutral CP -even scalar plays in electroweak symmetry breaking, by measuring its relative decay rates into pairs of electroweak vector bosons: W + W − , ZZ, γγ, and Zγ. With the data-driven assumption that electroweak symmetry breaking respects a remnant custodial symmetry, we perform a general analysis with operators up to dimension five. Remarkably, only three pure cases and one nontrivial mixed case need to be disambiguated, which can always be done if all four decay modes to electroweak vector bosons can be observed or constrained. We exhibit interesting special cases of Higgs look-alikes with nonstandard decay patterns, including a very suppressed branching to W + W − or very enhanced branchings to γγ and Zγ. Even if two vector boson branching fractions conform to Standard Model expectations for a Higgs doublet, measurements of the other two decay modes could unmask a Higgs imposter.

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Three-loop electroweak correction to the rho parameter in the large Higgs mass limit

Cited by 69 publications

References 26 publications

Electroweak two-loop corrections to the effective weak mixing angle

Electroweak two-loop corrections to the effective weak mixing angle

Precise prediction forM_Win the MSSM

Revealing the electroweak properties of a new scalar resonance

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Three-loop electroweak correction to the rho parameter in the large Higgs mass limit

Cited by 69 publications

References 26 publications

Electroweak two-loop corrections to the effective weak mixing angle

Electroweak two-loop corrections to the effective weak mixing angle

Precise prediction forMWin the MSSM

Revealing the electroweak properties of a new scalar resonance

Contact Info

Product

Resources

About

Precise prediction forM_Win the MSSM