Muon anomalous magnetic dipole moment in supersymmetric theories

By S. P. Martin, J. Wells. 2001

244 citations recorded by the source corpus.

We study the muon anomalous magnetic dipole moment in supersymmetric theories. The impact of the recent Brookhaven E821 experimental measurement on both model-independent and model-dependent supersymmetric parameter spaces is discussed in detail. We find that values of $\mathrm{tan}\ensuremath{\beta}$ as low as 3 can be obtained while remaining within the E821 one-sigma bound. This requires a light smuon; however, we show that, somewhat surprisingly, no model-independent bound can be placed on the mass of the lightest chargino for any $\mathrm{tan}\ensuremath{\beta}g~3.$ We also show that the maximum contributions to the anomalous magnetic moment are insensitive to CP-violating phases. We provide analyses of the supersymmetric contribution to the muon anomalous magnetic moment in dilaton-dominated supergravity models and gauge-mediated supersymmetry-breaking models. Finally, we discuss how other phenomena, such as $B(\stackrel{\ensuremath{\rightarrow}}{b}s\ensuremath{\gamma}),$ relic abundance of the lightest superpartner, and the Higgs boson mass may be correlated with the anomalous magnetic moment, but do not significantly impact the viability of a supersymmetric explanation, or the mass limits obtainable on smuons and charginos.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/383a9bc50e6a245eda0d37f62b3e113d6cec2bf1

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Citations in the corpus

Updated Constraints on the Minimal Supergravity Model (2002, background): “[34], modified to include leading logarithmic QED 2-loop corrections [35] which increase aμ, SUSY by ∼ 5%.”
Scalar flavour-changing neutral currents in the large-tan β limit (2001, background): “We also set 0 > 0, following the indication μ > 0 from b→ sγ and (g − 2)μ [16].”
Fitting the Phenomenological MSSM (2009, background): “t terms are set to be equal. At, Ab, Aτ may all change the likelihood signiﬁcantly, and we also include Ae = Aµ because it is relevant for the computation of the anomalous magnetic moment of the muon [52]. We set Au = Ac = Ad = As = 0 since these are proportional to the SM Yukawa couplings which are”
SuperIso v2.3: A program for calculating flavor physics observables in supersymmetry (2008, unknown): “The one-loop SUSY contributions to aμ are [55] δa 0 μ = mμ 16π2 n χ0”
A Call for New Physics : The Muon Anomalous Magnetic Moment and Lepton Flavor Violation (2016, background): “gative or positive contribution to g 2, along with the value for tan. Anyway, it is easy to see that there is plenty of room to accommodate the g 2 for several values of tan;A , and m ~. See Refs. [250, 279] for details. 10.1.2. Connecting g 2 and !e The correlation between g 2 and !e has been inves”
The Muon Magnetic Moment and Supersymmetry (2006, background): “For any given M1 and tan β, aµ is larger in panel (b) mainly due to the relative suppression of the sfermion masses by 1/ √ Nmess.”