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T: Fachverband Teilchenphysik
T 86: Elektroschwache Physik (Theorie) 1
T 86.7: Talk
Wednesday, March 26, 2014, 18:15–18:30, P103
Two-Loop Corrections to the Muon Magnetic Moment from Fermion/Sfermion Loops in the MSSM — Helvecio Fargnoli1, Christoph Gnendiger2, •Sebastian Paßehr3, Dominik Stöckinger2, and Hyejung Stöckinger-Kim2 — 1Universidade Federal de Lavras, Lavras, Brazil — 2Institut für Kern- und Teilchenphysik,TU Dresden, Dresden, Germany — 3Max-Planck-Institut für Physik, München, Germany
Two-loop corrections to the anomalous magnetic moment of the muon (g−2)µ from fermion/sfermion loops in the MSSM have been evaluated and were published recently. These corrections are generally large since they include Δρ and Δα. Furthermore they are logarithmically enhanced by heavy sfermion masses, therefore playing a significant role in split spectra scenarios. For that limit a compact approximation formula has been worked out. However, also for small MSSM parameters these corrections can be sizable.
In this talk I am going to specify the investigated class of Feynman diagrams and briefly outline some aspects of their evaluation and which role they play in the prediction of (g−2)µ. Finally, I am going to present numerical analyses of the new contributions in different parameter scenarios.