Probing the Higgs self coupling via single Higgs production at the LHC

Abstract

We propose a method to determine the trilinear Higgs self coupling that is alternative to the direct measurement of Higgs pair production total cross sections and differential distributions. The method relies on the effects that electroweak loops featuring an anomalous trilinear coupling would imprint on single Higgs production at the LHC. We first calculate these contributions to all the phenomenologically relevant Higgs production ($gg\mathrm{F}$, VBF, $WH$, $ZH$, $t\bar{t}H$) and decay ($\gamma \gamma$, $W{W}^{\ast }/Z{Z}^{\ast }\to 4f$, $b\bar{b}$, $\tau \tau$) modes at the LHC and then estimate the sensitivity to the trilinear coupling via a one-parameter fit to the single Higgs measurements at the LHC 8 TeV. We find that the bounds on the self coupling are already competitive with those from Higgs pair production and will be further improved in the current and next LHC runs.

34 pages, 13 figures, 5 tables; V2: New appendix A added on the comparison with the Effective Field Theory approach; V3: Journal version

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• Role of dimension-eight operators in an EFT for the 2HDM
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• Two-loop corrections to the triple Higgs boson production cross section
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• Virtual signatures of dark sectors in Higgs couplings
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• Machine learning the trilinear and light-quark Yukawa couplings from Higgs pair kinematic shapes
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• BSM patterns in scalar-sector coupling modifiers
• Improved constraints on Higgs boson self-couplings with quartic and cubic power dependencies of the cross section
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• Relevance of one-loop SMEFT matching in the 2HDM
• Extracting Higgs Self-Coupling Constraints through Triple Higgs Boson Production at Future Hadron Colliders
• Higgs boson pair production and decay at NLO in QCD: the $b\bar{b}\gamma \gamma$ final state
• Constraining the Higgs potential using multi-Higgs production
• Scalar and gauge sectors in the 3-Higgs Doublet Model under the S3-symmetry
• Higgs probes of top quark contact interactions and their interplay with the Higgs self-coupling
• Two loops, four tops and two ${\gamma }_5$ schemes: a renormalization story