arXiv:1808.05534
SI-HEP-2018-27
CP3-18-55
MCnet-18-21

by: Kilian, Wolfgang (Siegen U.) et al.

Abstract:
We study multi-Higgs final states in vector boson fusion (VBF) processes at the LHC and at future proton-proton colliders, focusing on the prospects for measurements at 27 TeV and at 100 TeV. We use an effective Lagrangian which includes higher-dimensional operators in the mass eigenstates which are relevant to VBF processes and relate this to specific parameterizations and models for new physics in the Higgs sector. We derive theoretical constraints on the parameter space from the unitarity of $2\to n$ scattering amplitudes and apply the results to $V V \to hh$ and $h h h$ processes. We numerically compute cross sections with appropriate VBF cuts for 14 TeV, 27 TeV, and 100 TeV respectively. The results describe the potential for constraining new physics in the Higgs sector at the LHC and at future hadron colliders.