Abstract
An important physics goal of a possible next-generation high-energy hadron collider will be precision characterisation of the Higgs sector and electroweak symmetry breaking. A crucial part of understanding the nature of electroweak symmetry breaking is measuring the Higgs self-interactions. We study dihiggs production in proton-proton collisions at 100 TeV centre of mass energy in order to estimate the sensitivity such a machine would have to variations in the trilinear Higgs coupling around the Standard Model expectation. We focus on the two b-jets plus diphotons final state, including possible enhancements in sensitivity by exploiting dihiggs recoils against a hard jet. We find that it should be possible to measure the trilinear self-coupling with 40% accuracy given 3/ab and 12% with 30/ab of data.
Highlights
We combine both analyses in the bbγγ channel to formulate a constraint on the Higgs trilinear coupling in light of the expected signal and background yields in pp → hh + X and pp → hh + jet + X production
The precision measurement of the Higgs trilinear coupling at a future high energy hadron collider is an important motivation for the construction of such a machine
In this paper we have performed an analysis of dihiggs final states in the bbγγ channel at a 100 TeV hadron collider
Summary
We generate signal events at leading order in the Les Houches Event File format [50] using a combination of the Vbfnlo [51] and FeynArts/FormCalc/LoopTools [52, 53] frameworks. We normalise to the NLO cross section by multiplying a phase-space independent K-factor of 1.65 [54,55,56]. Our leading order results for λ = (0, 1, 2) λSM are σsig = (1676.9, 860.6, 415.5) fb respectively. These are to be compared with an inclusive cross-section of 33.8 fb at NLO
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