Sebastian Paßehr

Non-decoupling two-loop corrections to (g−2)μ from fermion/sfermion loops in the MSSM

Abstract Two-loop contributions to the muon ( g − 2 ) from fermion/sfermion loops in the MSSM are presented, and an overview of the full MSSM prediction for ( g − 2 ) is given with emphasis on the behaviour in scenarios which are compatible with LHC data, including scenarios with large mass splittings. Compared to all previously known two-loop contributions, the fermion/sfermion loop contributions can yield the largest numerical results. The new contributions contain the important universal quantities Δα and Δρ, and for large sfermion masses the contributions are non-decoupling and logarithmically enhanced. We find up to 15 % ( 30 % ) corrections for sfermion masses in the 20 TeV (1000 TeV) range.

Higgs boson masses and mixings in the complex MSSM with two-loop top-Yukawa-coupling corrections

A bstractResults for the leading two-loop corrections of Oαt2

Two-loop top-Yukawa-coupling corrections to the Higgs boson masses in the complex MSSM

\mathcal{O}\left({\alpha}_t^2\right)

Two-loop top and bottom Yukawa corrections to the Higgs-boson masses in the complex MSSM

from the Yukawa sector to the Higgs-boson mass spectrum of the MSSM with complex parameters are presented, with details of the analytical calculation performed in the Feynman-diagrammatic approach using a mixed on-shell/DR¯

FormCalc 9 and Extensions

\overline{\mathrm{DR}}

Two-loop top-Yukawa-coupling corrections to the charged Higgs-boson mass in the MSSM

scheme that can be directly matched onto the higher-order terms in the code FeynHiggs. Numerical results are shown for the masses and mixing effects in the neutral Higgs-boson sector and their variation with the phases of the complex parameters. Furthermore, the analytical expressions of the two-loop self-energies and the required renormalization constants are recorded. The new results can consistently be implemented in FeynHiggs.