Electroweak and supersymmetric two-loop corrections to (g-2)_μ

Details Electroweak and supersymmetric two-loop corrections to (g-2)_μ Electroweak and supersymmetric two-loop corrections to (g-2)_μ

2004-05-25

arxiv.org/abs/hep-ph/0405255v1

Nucl.Phys. B699 (2004) 103-123

Physics

High Energy Physics

High Energy Physics - Phenomenology

23 pages, 9 figures

Scientific paper

10.1016/j.nuclphysb.2004.08.014

We present the up to now most precise evaluation of electroweak and supersymmetric contributions to the anomalous magnetic moment of the muon \amu, describing in detail also the calculational techniques. We calculate the bosonic two-loop contributions in the Standard Model without the approximation of a heavy Higgs-boson mass, finding corrections up to 0.2*10^{-10} for a light Higgs boson. In the Minimal Supersymmetric Standard Model the corresponding two-loop contributions from the two-Higgs-doublet model part differ from the Standard Model result by up to 0.3*10^{-10}. Finally, we evaluate the diagrams where a loop of charginos or neutralinos, the superpartners of gauge and Higgs bosons, is inserted into a two-Higgs-doublet one-loop diagram. These corrections can amount up to 10*10^{-10}, which is almost 2\sigma of the current experimental uncertainty.

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