Speaker
Martin Gabelmann
(Karlsruhe Institute of Technology)
Description
The absence of new physics in current LHC searches leads to increasing interest in a variety of non-minimal extensions of the Standard Model (SM). Also the scale of new physics in widely studied models is pushed to higher energies. Automation tools such as SARAH allow for comprehensive studies of a wider class of models beyond the Standard Model (SM). Not only the tree-level values but also NLO and NNLO corrections to mass spectra can be studied within a reasonable amount of time. However, large mass gaps can lead to problematic large logarithms increasing the uncertainty in fixed order calculations. The use of effective field theories (EFTs) is a common tool to resum these large logs. Thus, precise matching conditions between EFTs and UV complete -or intermediate- theories are needed. After a brief introduction into the running and matching procedures applied by SARAH/SPheno I will discuss various aspects important for a generic matching of scalar sectors at NLO. The connection of systematic cancellations of infrared divergences and contributions from mixed loops containing heavy and light fields in matching conditions is shown. Example cases for EFT Higgs mass calculations within heavy SUSY are presented as well.
