29 September 2015 to 2 October 2015
DESY Hamburg
Europe/Berlin timezone

Semi-automated two-loop calculations at the example of Higgs masses in the MSSM

1 Oct 2015, 14:30
Seminar room 4b (DESY Hamburg)

Seminar room 4b

DESY Hamburg


Dr Sebastian Paßehr (DESY)


Two-loop calculations with non-trivial renormalization are necessary for the determination of high-precision theory predictions of experimentally well-known quantities. A famous example is the mass of a Higgs-like particle which has been measured at the LHC with a precision at the sub-percent level. A possible interpretation of this particle is given by the Minimal Supersymmetric Standard Model (MSSM) as one of its five physical Higgs bosons. A precise prediction of the Higgs spectrum in the MSSM relies on higher-order corrections. The main focus of this talk is set on the conceptual implementation in seven distinct steps of the top Yukawa coupling enhanced two-loop corrections to the Higgs spectrum in the complex MSSM. Each step is specific to the contribution computed here, but due to its modular structure the code can be adapted with little effort for similar calculations. The complete code is part of the publicly available program FeynHiggs.

Primary authors

Dr Sebastian Paßehr (DESY) Dr Thomas Hahn (Max Planck Institute for Physics)

Presentation Materials