VBS W±W±H production at the HL-LHC and a 100 TeV pp-collider

Abstract

[Formula: see text] production at hadron colliders through vector boson scattering is a so far unconsidered process, which leads to a clean signature of two same-sign charged leptons and two widely separated jets. This process is sensitive to the [Formula: see text] and [Formula: see text] couplings and any deviation of these couplings from their SM predictions serves as direct evidence of new physics beyond the SM. In this paper, we perform a Monte Carlo study of this process for the [Formula: see text] LHC and a 100 TeV [Formula: see text]-collider, and provide projections of the constraints on the triple-Higgs and [Formula: see text] quartic couplings for these environments. In particular, we consider the impact of pileup on the expected sensitivity in this channel. Our analysis demonstrates that although the sensitivity to the [Formula: see text] coupling is rather low, the [Formula: see text] coupling can be constrained in this channel within [Formula: see text][Formula: see text]100% and [Formula: see text][Formula: see text]20% at 95% confidence level around the SM prediction at the HL-LHC and a 100 TeV [Formula: see text]-collider, respectively. We have also provided results with simple truncation scheme, in consideration of unitarity safety.