Resummation of logarithmic contributions in MSSM Higgs boson mass calculations

by Henning Bahl

Wednesday 17 Jun 2015, 11:15 → 12:15 Europe/Berlin

Main-2-313 (MPI fuer Physik)

One of the most promising models for Beyond Standard Model physics is the Minimal Supersymmetric Standard Model (MSSM). It is a distinct feature of the MSSM that the mass of the lightest Higgs boson is calculable in terms of the model parameters. Identifying it with the recently discovered Higgs boson at the LHC, a precision calculation is necessary to fully profit theoretically from the accurateness reached in the measurement of the Higgs boson's mass. Existing diagrammatic calculations are already quite accurate for low masses of supersymmetric particles. For heavy supersymmetric particles however, the result contains large logarithms, which need to be resummed. This can be achieved in an effective field theory approach using renormalization group equations. To profit also from the explicit diagrammatic calculation, both methods have to be combined taking care of the different employed renormalization schemes and avoiding double-counting of one- and two-loop terms. I will discuss how this approach can be refined by extending it to electroweak contributions and implementing a chargino/neutralino as well as a gluino threshold.