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We consider the contribution of a two-loop Barr-Zee type diagram to$(g-2)_\mu$ in the minimal supersymmetric standard model (MSSM). At relativelylarge $\tan\beta$, we show that the contribution of light third generationscalar fermions and neutral CP-even Higgs, $h^0(H^0)$, can easily explain thevery recent BNL experimental data. In our analysis $(g-2)_\mu$ prefers negative$A_{f}$ and positive $\mu$. It is more sensitive to the chirality flipping$h^0(H^0)\wt{f}_R^*\wt{f}_L$ rather than chirality conserving couplings.Comment: 10 pages, 5 figures, references adde

physical review. d. particles, fields, gravitation, and cosmology/physical review. d. particles and fields

Two-loop Barr-Zee type contributions to<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mo>(</mml:mo><mml:mi>g</mml:mi><mml:mi>−</mml:mi><mml:mrow><mml:msub><mml:mrow><mml:mn>2</mml:mn><mml:mo>)</mml:mo></mml:mrow><mml:mrow><mml:mi>μ</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>in the minimal supersymmetric standard model

Two-loop Barr-Zee type contributions to(g−2)μin the minimal supersymmetric standard model