Speaker
Description
We present a study of Higgs interference effects for the ttbar decay mode at NLO QCD in the 1-Higgs-singlet extension of the Standard Model. Results for stable tops are presented. The interference effects have been studied for different benchmark points with heavy Higgs masses in the range 700--3000 GeV. For this purpose a new Monte Carlo framework has been developed. This has made it possible to study the interference effect between tree-level and loop-induced processes at NLO, and can easily be generalised to work for any loop-induced process.
In addition, I will present H1jet, a fast and easy-to-use program that computes the differential distribution in the transverse momentum of a colour singlet. H1jet can be used by theorists to quickly assess deviations of selected new physics models from the Standard Model behaviour, and quickly obtain distributions of relevance for Standard Model phenomenology.
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