Precision calculations in New Physics searches.
The Standard Model of particle physics, despite its amazing success, still fails to address a couple of important issues. There have been countless models trying to resolve some or all of these problems and complete our understanding of nature at high scales. This is the reason why the searches for new physics at e.g. LHC need to systematically put limits on these models so that we might get a hint at what actually is realized in nature.
To this end we go beyond the standard leading order calculations and try and make more precise and stable predictions for collider observables, shedding light on what might be expected in the future.