Constraints on the trilinear Higgs coupling from vector boson fusion and associated Higgs production at the LHC

Wojciech Bizon; Martin Gorbahn; Ulrich Haisch; Giulia Zanderighi

doi:10.1007/JHEP07(2017)083

paper

Constraints on the trilinear Higgs coupling from vector boson fusion and associated Higgs production at the LHC

arXiv:1610.05771 · doi:10.1007/JHEP07(2017)083

Abstract

We examine the constraints on the trilinear Higgs coupling $λ$ that originate from associated ( $V h$ ) and vector boson fusion (VBF) Higgs production in $pp$ collisions in the context of the Standard Model effective field theory. The 1-loop contributions to $pp \to V h$ and $pp \to j j h$ that stem from insertions of the dimension-6 operator $O_{6} = - λ (H^{†} H)^{3}$ are calculated and combined with the $O (λ)$ corrections to the partial decay widths of the Higgs boson. Employing next-to-next-to-leading order QCD predictions, we analyse the sensitivity of current and forthcoming measurements of the signal strengths in $V h$ and VBF Higgs production to changes in $λ$ . We show that future LHC runs may be able to probe modifications of $λ$ with a sensitivity similar to the one that is expected to arise from determinations of double-Higgs production. The sensitivity of differential $V h$ and VBF Higgs distributions to a modified $h^{3}$ coupling is also studied.

23 pages, 7 figures; v2: matches published version

Constraints on the trilinear Higgs coupling from vector boson fusion and associated Higgs production at the LHC

Abstract

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