The measurement of the Higgs self-coupling at the LHC: theoretical status

By Julien Baglio, Abdelhak Djouadi, R. Grober, M. Muhlleitner, J. Quevillon, Michael Spira. 2012

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A bstractNow that the Higgs boson has been observed by the ATLAS and CMS experiments at the LHC, the next important step would be to measure accurately its properties to establish the details of the electroweak symmetry breaking mechanism. Among the measurements which need to be performed, the determination of the Higgs self-coupling in processes where the Higgs boson is produced in pairs is of utmost importance. In this paper, we discuss the various processes which allow for the measurement of the trilinear Higgs coupling: double Higgs production in gluon fusion, vector boson fusion, double Higgs-strahlung and associated production with a top quark pair. We first evaluate the production cross sections for these processes at the LHC with center-of-mass energies ranging from the present $ \sqrt{s}=8 $ TeV to $ \sqrt{s}=100 $ TeV, and discuss their sensitivity to the trilinear Higgs coupling. We include the various higher order QCD radiative corrections, at next-to-leading order for gluon and vector boson fusion and at next-to-next-to-leading order for associated double Higgs production with a gauge boson. The theoretical uncertainties on these cross sections are estimated. Finally, we discuss the various channels which could allow for the detection of the double Higgs production signal at the LHC and estimate their potential to probe the trilinear Higgs coupling.

Subfields: Artificial Intelligence, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/1bc889f3da429e61e6ada190d4992d0e23a95e30

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Citations in the corpus

The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations (2014, background): “ in the four-ﬂavour scheme to avoid resonant-top contributions. Processes h.1, h.2, h.3, h.6, h.12, and h.13 have appeared in ref. [127] as NLO+PS results; some of these were already known at the NLO [339]. The W-boson width is set equal to 2.0476 GeV for process h.13. Previous to the release of Mad”
Full top quark mass dependence in Higgs boson pair production at NLO (2016, background): “As already observed for the LO cross section [23], it has a minimum around λ = 2.”
Probing the Higgs self coupling via single Higgs production at the LHC (2016, methodology): “A plethora of perspective studies performed at √ s = 13 TeV suggest that it should be possible to detect the production of a Higgs pair via bb̄γγ [16, 18–22], bb̄ττ [16, 23], bb̄W+W− [24] and bb̄bb̄ [25–27] final states, and also via signatures emerging from tt̄HH [28, 29] and HV V [30] production c”
Collider physics at the precision frontier (2020, methodology): “eliable in rather inclusive setups or in extreme regions of phase space. HHV Associated production of a Higgs boson pair with a vector boson has been calculated at NNLO for the inclusive case in Ref. [348]. The gluon fusion channel, entering ZHH production at order 2 s, was found to contribute O(20%”
Higgs boson self-coupling measurements using ratios of cross sections (2013, methodology): “[35] the final state bb̄γγ was revisited as well as bb̄τ+τ− and bb̄W+W− (fully leptonic), without making use of jet substructure techniques (although boosted Higgs bosons were required).”
Top-quark mass effects in double and triple Higgs production in gluon-gluon fusion at NLO (2014, background): “main HH production channels at NLO in QCD for hadron collider energies ranging from 8 to 100 TeV can be found in [44]. NNLO results for vector boson fusion [45] and vector boson associated production [33] are also available. For triple Higgs production gluon-gluon fusion is again the dominant produc”