Implications of the Muon Anomalous Magnetic Moment for Direct Detection of Neutralino Dark Matter

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概要

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• We investigate the implications of a recent measurement of the muon anomalous magnetic moment for the direct detection of neutralino dark matter in three different SUSY models:mSUGRA, a model with non-universal Higgs mass, and an SO(10) GUT model. We consider two cases for the value of Δa_μ, 27 × 10^<-10> < Δa_μ < 59 × 10^<-10> (corresponding to a range of 1σ about the experimental value) and 0 < Δa_μ < 11 × 10^<-10> (corresponding to a range more than 2σ below the experimental value). In the mSUGRA model, the counting ratio may be above the sensitivity of future experiments in the case that parameters are within a 1σ bound of Δa_μ. However, Ω_χ tends to be large compared to the currently accepted value Ω = 0.3. For models with non-universal scalar masses, the possibility of having a consistent Ω_χ and a large counting ratio exists in the region of parameter space where the Higgsino mass μ is smaller than the mSUGRA prediction. In particular, in the SO(10) model, the LSP dark matter detection rate may be enhanced by almost one order of magnitude compared to that in mSUGRA and the model with non-universal Higgs mass, for cosmologically acceptable Ω_χh^2. The highest detection rate of LSP dark matter occurs in the region where the LSP constitutes a subdominant part of the local halo DM. The implications of the SUSY mass parameter measurement subject to the cosmological constraint are also discussed.

• 理論物理学刊行会の論文
• 2001-09-25

著者

• NOJIRI Mihoko

  National Laboratory for High Energy Physics (KEK)

• Kim Yeong

  Yukawa Institute For Theoretical Physics Kyoto University

• Nojiri M

  Yukawa Institute For Theoretical Physics Kyoto University

• NOJIRI Mihoko

  Yukawa Institute for Theoretical Physics, Kyoto University

• KIM Yeong

  Yukawa Institute for Theoretical Physics, Kyoto University

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