Two-loop Barr-Zee type Contributions to (g-2)_μ in the MSSM

2001/04/26 by Abdesslam Arhrib, Seungwon Baek
Physics and Astronomy · #Black Holes and Theoretical Physics #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1103/physrevd.65.075002

published as Phys.Rev. D65 (2002) 075002 · 10 pages, 5 figures, references added

arxiv created 2001/04/26 · openalex publication_date 2002/03/08 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We consider the contribution of a two-loop Barr-Zee type diagram to (g-2)_μ in the minimal supersymmetric standard model (MSSM). At relatively large tanβ, we show that the contribution of light third generation scalar fermions and neutral CP-even Higgs, h⁰(H⁰), can easily explain the very recent BNL experimental data. In our analysis (g-2)_μ prefers negative A_f and positive μ. It is more sensitive to the chirality flipping h⁰(H⁰)\wtf_R^*\wtf_L rather than chirality conserving couplings.

Citations

• New results on the hadronic contributions to α(MZ2) and to (g−2)μ