Two-loop SUSY corrections to the anomalous magnetic moment of the muon

Heinemeyer, S.

doi:10.1016/s0550-3213(04)00300-1

Cited by 19 publications

(47 citation statements)

References 23 publications

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“…Gray circles in figure 2 denote all possible bosonic loops. These 2-boson diagrams contain the socalled Barr-Zee diagrams, which have already been computed and intensively discussed in the literature [38,47,[55][56][57][58]. The 2-boson diagrams also contain self-energy type diagrams in which the external photon couples to the muon line.…”

Section: -Boson and 3-boson Diagramsmentioning

confidence: 94%

“…In other models, such as the MSSM, several classes of two-loop contributions have been evaluated [54][55][56][57][58][59][60][61]. It has been found that each class can give rise to significant corrections, and an analysis of the remaining MSSM theory uncertainty has shown that the future experimental precision can only be matched by a complete two-loop computation [62,63].…”

Section: 2)mentioning

confidence: 99%

“…[54,55] using TwoCalc [77] for evaluating two-loop integrals and in-house routines for reduction to master integrals, large mass expansion, and analytical simplification.…”

Section: Jhep01(2017)007mentioning

confidence: 99%

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The muon magnetic moment in the 2HDM: complete two-loop result

Cherchiglia

Kneschke

Stöckinger

et al. 2017

J. High Energ. Phys.

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Abstract:We study the 2HDM contribution to the muon anomalous magnetic moment a µ and present the complete two-loop result, particularly for the bosonic contribution. We focus on the Aligned 2HDM, which has general Yukawa couplings and contains the type I, II, X, Y models as special cases. The result is expressed with physical parameters: three Higgs boson masses, Yukawa couplings, two mixing angles, and one quartic potential parameter. We show that the result can be split into several parts, each of which has a simple parameter dependence, and we document their general behavior. Taking into account constraints on parameters, we find that the full 2HDM contribution to a µ can accommodate the current experimental value, and the complete two-loop bosonic contribution can amount to (2 · · · 4) × 10 −10 , more than the future experimental uncertainty.

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Section: -Boson and 3-boson Diagramsmentioning

confidence: 94%

Section: 2)mentioning

confidence: 99%

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The muon magnetic moment in the 2HDM: complete two-loop result

Cherchiglia

Kneschke

Stöckinger

et al. 2017

J. High Energ. Phys.

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“…1 Higher order contributions have been computed in [55][56][57][58][59][60][61][62][63]. At 1 loop there are five main contributions that can be split into two classes of diagrams: chargino/sneutrino and neutralino/smuon contributions.…”

Section: The Relic Density and (G − 2) µ In The Mssmmentioning

confidence: 99%

GUT-inspired SUSY and the muon g-2 anomaly: Prospects for LHC 14 TeV

Sessolo¹,

Kowalska²,

Roszkowski³

et al. 2016

Proceedings of 18th International Conference From the Planck Scale to the Electroweak Scale — PoS(PLANCK 2015)

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Abstract:We consider the possibility that the muon g − 2 anomaly, δ (g − 2) µ , finds its origins in low energy supersymmetry (SUSY). In the general MSSM the parameter space consistent with δ (g − 2) µ and correct dark matter relic density of the lightest neutralino easily evades the present direct LHC limits on sparticle masses and also lies to a large extent beyond future LHC sensitivity. The situation is quite different in GUT-defined scenarios where input SUSY parameters are no longer independent. We analyze to what extent the LHC can probe a broad class of GUT-inspired SUSY models with gaugino nonuniversality that are currently in agreement with the bounds from δ (g − 2) µ , as well as with the relic density and the Higgs mass measurement. To this end we perform a detailed numerical simulation of several searches for electroweakino and slepton production at the LHC and derive projections for the LHC 14 TeV run. We show that, within GUT-scale SUSY there is still plenty of room for the explanation of the muon anomaly, although the current LHC data already imply strong limits on the parameter space consistent with δ (g − 2) µ . On the other hand, we demonstrate that the parameter space will be basically fully explored within the sensitivity of the 14 TeV run with 300 fb −1 . This opens up the interesting possibility that, if the (g − 2) µ anomaly is real then some positive signals must be detected at the LHC, or else these models will be essentially ruled out. Finally, we identify the few surviving spectra that will provide a challenge for detection at the LHC 14 TeV run and we characterize their properties.

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“…At one-loop level, the supersymmetric contributions to a µ with a µ = 1 2 (g − 2) µ [123][124][125][126][127][128] originate from chargino-sneutrino and neutralino-smuon loops. Large contributions may come from neutralino-smuon loops when µ is large along with smaller slepton masses [129][130][131].…”

Section: Muon G −mentioning

confidence: 99%

Exploring MSSM for charge and color breaking and other constraints in the context of Higgs@125 GeV

Chattopadhyay

Dey

2014

J. High Energ. Phys.

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Exploring MSSM parameter space after the discovery of Higgs Boson at 125 GeV naturally demands large top-squark mixing or large trilinear coupling parameter A t in particular, so as to avoid excessively heavy squark, specially for the universal models like CMSSM. We study stability of electroweak symmetry breaking vacua in possible presence of deeper charge-color symmetry breaking minima within MSSM. Besides stable vacua, we consider scenarios characterized by the presence of global CCB minima, with SM like charge and color conserving vacuum, having stability over cosmologically large lifetime (long-lived states). We allow vacuum expectation values for both stop as well as sbottom fields, since these belong to the third generation of sfermions with larger Yukawa couplings that have immediate effect on the tunneling time. Moreover, for large µ regions, radiative corrections to Higgs boson mass from bottom-squark loop is quite significant. Regions of MSSM parameters space become viable for large A t and large µ zones which are generically excluded via the traditional analytical CCB constraints. For a large value of tan β, safe vacua associated with large values of |µ| and |A t | are predominantly long-lived and may be associated with relatively light stop masses. We also identify low µ regions associated with long-lived states. Both the above zones can be friendly to muon g − 2 constraint. We also impose constraints from Br(B → X s γ) and Br(B s → µ + µ − ). We do the analysis for a moderate and a large tan β. We choose an example parameter point in the gaugino mass plane of M 1 , M 2 that satisfies the dark matter constraints, basically a decoupled sector with respect to CCB.

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Two-loop SUSY corrections to the anomalous magnetic moment of the muon

Cited by 19 publications

References 23 publications

The muon magnetic moment in the 2HDM: complete two-loop result

The muon magnetic moment in the 2HDM: complete two-loop result

GUT-inspired SUSY and the muon g-2 anomaly: Prospects for LHC 14 TeV

Exploring MSSM for charge and color breaking and other constraints in the context of Higgs@125 GeV

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