Abstract
In the upcoming LHC run we will be able to probe the structure ofthe loop--induced Higgs--gluon coupling through kinematics. First, we establish state-of-the-art simulations with up to two jets to next-to-leading order including top mass effects. They allow us to search for deviations from the low-energy limits in boosted Higgs production. In addition, the size of the top mass effects suggests that they should generally be included in Higgs studies at the LHC. Next, we show how off-shell Higgs production with a decay to four leptons is sensitive to the same top mass effects. We compare the potential of both methods based on the same top--Higgs Lagrangian. Finally, we comment on related model assumptions required for a Higgs width measurement.
Highlights
Being produced at large transverse momenta the Higgs boson will recoil against a hard jet system
We have introduced a state-of-the-art simulation tool based on next-to-leading order multi-jet merging
Our results show that the top mass effects factorize for each number of hard jets to leading
Summary
As long as we limit ourselves to the total cross section of the Standard Model Higgs boson, the heavy top limit or low-energy limit provides an accurate prediction for the total rate. Because this automized implementation relies on the low-energy limit for the Higgs-gluon coupling described in eq (2.1), we reweight all tree-level matrix elements in the effective theory with their full loop counterparts This defines a correction factor [94,95,96]. The lower panels of figure 2 indicate that an experimental analysis including systematic and theoretical uncertainties can rely on the range pT,H < mt as a safe reference region, searching for a distinct turn-over in the distribution around pT,H = mt This observed factorization at leading order strengthens the basic assumption underlying our precision study, namely that top mass effects in Higgs production are fully associated with the hard process. In the left panel we show that apart from the different total rate all top mass features are completely analogous
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