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The muon anomalous magnetic moment $a_\mu$ is investigated in the MSSM for$\tan\beta\to\infty$. This is an attractive example of radiative muon massgeneration with completely different qualitative parameter dependence comparedto the MSSM with the usual, finite $\tan\beta$. The observed, positivedifference between the experimental and Standard Model value can only beexplained if there are mass splittings, such that bino contributions dominateover wino ones. The two most promising cases are characterized either by largeHiggsino mass $\mu$ or by large left-handed smuon mass $m_L$. The required masssplittings and the resulting $a_\mu^\text{SUSY}$ are studied in detail. It isshown that the current discrepancy in $a_\mu$ can be explained even in caseswhere all SUSY masses are at the TeV scale. The paper also presents usefulanalytical formulas, approximations for limiting cases, and benchmark points.

Large muon $(g-2)$ with TeV-scale SUSY masses for $\tan\beta\to\infty$