Supersymmetric two-loop contributions to the anomalous magnetic moment of the muon

Details Supersymmetric two-loop contributions to the anomalous magnetic moment of the muon Supersymmetric two-loop contributions to the anomalous magnetic moment of the muon

2004-06-28

arxiv.org/abs/hep-ph/0406306v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, Talk at Loops & Legs 2004, DESY Workshop on Elementary Particle Theory in Zinnowitz/Usedom

Scientific paper

10.1016/j.nuclphysbps.2004.09.01

Recent results of two interesting classes of supersymmetric two-loop contributions to (g-2)_mu are presented. Two-loop diagrams involving a closed sfermion loop can amount to 5*10^{-10} or almost one standard deviation of the current experimental uncertainty, and two-loop diagrams with a closed chargino/neutralino loop can be similarly large. The dependence of these two classes on the unknown supersymmetric parameters and the sensitivity on existing experimental constraints on the parameter space are quite different. We also comment on the calculational techniques, in particular the large mass expansion and the treatment of gamma_5 and the epsilon-tensor.

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