Updated Implications of the Muon Anomalous Magnetic Moment for Supersymmetry

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  • 7 August 2002
Abstract
We re-examine the bounds on supersymmetric particle masses in light of the new E821 data on the muon anomalous magnetic moment and the revised theoretical calculations of its hadronic contributions. Given that the current experimental excess is only about 1.9 sigma, there is no strong evidence for new physics. However, if one interprets the excess as coming from supersymmetry, one can obtain bounds on the particles of the minimal supersymmetric standard model (MSSM). We find in the most general MSSM that there must be 2 particles with masses below 760 (540) GeV at the 1 sigma lower bound (central value) of the excess. If we further impose gaugino mass unification, these limits do not change appreciably, but now there must be one particle below 580 (400) GeV. There is no lower bound on tan(beta) implied by the data.

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