Muon anomalous magnetic dipole moment in supersymmetric theories

Martin, Stephen P.; Wells, James D.

doi:10.1103/physrevd.64.035003

Cited by 316 publications

(279 citation statements)

References 61 publications

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“…In the case of smuon L-R mixing, some considerations follow from the present value for the muon anomalous magnetic moment, or (g ÿ 2), which is a chirality odd operator and which can arise from L-R mixing in one-loop graphs [42]. The only supersymmetric contribution a to a g ÿ 2 =2 proportional to one single power of the ratio of the muon mass and of supersymmetric particles is in fact proportional to the smuon L-R mixing, and reads…”

Section: B Left-right Mixing Contributionsmentioning

confidence: 99%

Supersymmetric contributions to weak decay correlation coefficients

2007

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We study supersymmetric contributions to correlation coefficients that characterize the spectral shape and angular distribution for polarized -and -decays. In the minimal supersymmetric standard model (MSSM), one-loop box graphs containing superpartners can give rise to non-V ÿ A V ÿ A fourfermion operators in the presence of left-right or flavor mixing between sfermions. We analyze the present phenomenological constraints on such mixing and determine the range of allowed contributions to the weak decay correlation coefficients. We discuss the prospective implications for future -and -decay experiments, and argue that they may provide unique probes of left-right mixing in the first generation scalar fermion sector.

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Section: B Left-right Mixing Contributionsmentioning

confidence: 99%

Supersymmetric contributions to weak decay correlation coefficients

2007

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“…However, in the general case, already the oneloop contributions have an intricate parameter dependence, as shown on an analytic level in Refs. [32][33][34][35]. We illustrate this variety of possibilities at the one-loop level by Fig.…”

Section: Overview Of Susy Contributions To a µmentioning

confidence: 99%

“…They have been computed in the general MSSM in Ref. [33], see also [32,34]. If all relevant SUSY masses are equal to a common scale M SUSY , these contributions can be approximated by 13 × 10 −10 sgn(µ) tan β (100 GeV/M SUSY ) 2 , where µ is the Higgsino mass parameter and tan β = v u /v d is the ratio of the Higgs doublet vacuum expectation values.…”

Section: Overview Of Susy Contributions To a µmentioning

confidence: 99%

Non-decoupling two-loop corrections to (g−2)μ from fermion/sfermion loops in the MSSM

Fargnoli¹,

Gnendiger²,

Paßehr³

et al. 2013

Physics Letters B

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Two-loop contributions to the muon (g − 2) from fermion/sfermion loops in the MSSM are presented, and an overview of the full MSSM prediction for (g − 2) is given with emphasis on the behaviour in scenarios which are compatible with LHC data, including scenarios with large mass splittings. Compared to all previously known two-loop contributions, the fermion/sfermion-loop contributions can yield the largest numerical results. The new contributions contain the important universal quantities ∆α and ∆ρ, and for large sfermion masses the contributions are non-decoupling and logarithmically enhanced. We find up to 15% (30%) corrections for sfermion masses in the 20 TeV (1000 TeV) range.

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“…The MSSM contributions to δ (g − 2) µ have been calculated at 1 loop in [7,33,[50][51][52][53] using the mass insertion method. 1 Higher order contributions have been computed in [55][56][57][58][59][60][61][62][63].…”

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

confidence: 99%

“…A ∼ 3σ difference with the SM can easily be accommodated in the Minimal Supersymmetric Standard Model (MSSM) , which is rich in particles with the right couplings to provide significant loop contributions to the µµγ vertex. The 1-loop contributions in the MSSM [7,33] are roughly split into those arising from a chargino/sneutrino loop and those given by smuon/neutralino loops, so that at the lowest order the measurement of δ (g − 2) µ can be parametrized by…”

Section: Introductionmentioning

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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Muon anomalous magnetic dipole moment in supersymmetric theories

Cited by 316 publications

References 61 publications

Supersymmetric contributions to weak decay correlation coefficients

Supersymmetric contributions to weak decay correlation coefficients

Non-decoupling two-loop corrections to (g−2)μ from fermion/sfermion loops in the MSSM

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

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