Muon anomalous magnetic moment: A harbinger for “new physics”

Czarnecki, Andrzej; Marciano, William J.

doi:10.1103/physrevd.64.013014

Cited by 471 publications

(464 citation statements)

References 94 publications

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“…The impressive accuracy of the theoretical and experimental results renders a µ a high precision observable extremely sensitive to physics beyond the SM. Explaining this deviation has motivated extensive studies -not only taking into account the many possible (higher order) SM corrections, but also exploring new physics contributions capable of saturating the observed discrepancy [60]. Singlet extensions of the SM have been considered to address the (g −2) µ discrepancy; for instance, standard seesaws have been investigated [61], low-scale supersymmetric seesaw models (including right-handed neutrino superfields) [62], as well as B − L (Inverse Seesaw) extensions of the SM [63], among many others.…”

Section: Sterile Neutrinos and Lepton Magnetic Momentsmentioning

confidence: 99%

Effect of steriles states on lepton magnetic moments and neutrinoless double beta decay

Abada

Romeri

Teixeira

2014

J. High Energ. Phys.

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Abstract:We address the impact of sterile fermion states on the anomalous magnetic moment of charged leptons, as well as their contribution to neutrinoless double beta decays. We illustrate our results in a minimal, effective extension of the Standard Model by one sterile fermion state, and in a well-motivated framework of neutrino mass generation, embedding the Inverse Seesaw into the Standard Model. The simple "3+1" effective case succeeds in alleviating the tension related to the muon anomalous magnetic moment, albeit only at the 3σ level, and for light sterile states (corresponding to a cosmologically disfavoured regime). Interestingly, our analysis shows that a future 0ν2β observation does not necessarily imply an inverted hierarchy for the active neutrinos in this simple extension. Although the Inverse Seesaw realisation here addressed could indeed ease the tension in (g − 2) µ , bounds from lepton universality in kaon decays mostly preclude this from happening. However, these scenarios can also have a strong impact on the interpretation of a future 0ν2β signal regarding the hierarchy of the active neutrino mass spectrum.

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Section: Sterile Neutrinos and Lepton Magnetic Momentsmentioning

confidence: 99%

Effect of steriles states on lepton magnetic moments and neutrinoless double beta decay

Abada

Romeri

Teixeira

2014

J. High Energ. Phys.

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“…[294,295,296,297,298,299,300,301,302,303,304,305] (among others). One obvious question addressed in a number of these analyses is if an upper limit on superpartner masses could be deduced assuming there is such a deviation; in looking for such an upper limit one can of course drop the phase dependence.…”

Section: Dipole Moment Constraintsmentioning

confidence: 99%

The soft supersymmetry-breaking Lagrangian: theory and applications

Chung

Everett

Kane³

et al. 2005

Physics Reports

412

339

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After an introduction recalling the theoretical motivation for low energy (100 GeV to TeV scale) supersymmetry, this review describes the theory and experimental implications of the soft supersymmetry-breaking Lagrangian of the general minimal supersymmetric standard model (MSSM). Extensions to include neutrino masses and nonminimal theories are also discussed. Topics covered include models of supersymmetry breaking, phenomenological constraints from electroweak symmetry breaking, flavor/CP violation, collider searches, and cosmological constraints including dark matter and implications for baryogenesis and inflation.

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“…It is able to explain the current 3.6σ disagreement between theory and experiment of the muon (g-2) anomalous magnetic moment by introducing new particles in the loops [19][20][21][22][23][24].…”

Section: Supersymmetrymentioning

confidence: 99%

Beyond Standard Model Collider Phenomenology of Higgs Physics and Supersymmetry

Thomas¹

2016

Springer Theses

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In this thesis I study the collider phenomenology of BSM physics at the LHC, concentrating on the Higgs boson and supersymmetery. The implications and effects on cross sections of the loss of unitarity in scattering processes involving multiple vector bosons and/or the Higgs, when the Higgs couplings to the W and the Z are non-SM, is studied using an effective Lagrangian. Subsequently methods to remove unwanted background from transversely polarised vector bosons are explored, which enable an estimation of the potential to measure the Higgs couplings to weak bosons in a model-independent way via vector boson fusion. MSSM effects on Higgs production and decay are also considered, concentrating on the effects due to light stops, sbottoms and staus. Amongst other things, we find that light 3 rd generation squarks generally produce asymmetrical alteration in signal strengths of different production channels, generally causing µ V BF µ ggF > 1. Finally we extend some ATLAS analyses in the low ∆m = mt − mχ0 1 region, extending the excluded masses of light stops. This enables us to limit the maximum effects of light stops on the Higgs, and further limits the parameter space where the light stop scenario of electroweak baryogenesis is viable.

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Muon anomalous magnetic moment: A harbinger for “new physics”

Cited by 471 publications

References 94 publications

Effect of steriles states on lepton magnetic moments and neutrinoless double beta decay

Effect of steriles states on lepton magnetic moments and neutrinoless double beta decay

The soft supersymmetry-breaking Lagrangian: theory and applications

Beyond Standard Model Collider Phenomenology of Higgs Physics and Supersymmetry

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