Measurement of the Triple Higgs Coupling at a HE-LHC

Abstract

The currently unmeasured triple Higgs coupling is one of the strong motivations for future physics programs at the LHC and beyond. A sufficiently precise measurement can lead to qualitative changes in our understanding of electroweak symmetry breaking and the cosmological history of the Higgs potential. As such, the quantitative measurement of this coupling is now one of the benchmark measurements for any proposed collider. We study the capability of a potential $27\mathrm{TeV}$ HE-LHC upgrade in measuring the Higgs trilinear coupling via the di-Higgs production process in the $b\bar{b}\gamma \gamma$ channel. We emphasize that a key background from single Higgs production via gluon fusion has been underestimated and underappreciated in prior studies. We perform a detailed study taking into account two different potential detector scenarios, and validate against HL-LHC projections from ATLAS. We find that the di-Higgs production process can be observed at $\ge 4.5\sigma$, corresponding to a $\sim 40\%$ measurement of the Higgs self-coupling, with $15{\mathrm{ab}}^{-1}$ of data at the HE-LHC.

29 pages, 7 figures; matches version published in JHEP

References in corpus (20)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• An Introduction to PYTHIA 8.2
• Comparative study of various algorithms for the merging of parton showers and matrix elements in hadronic collisions
• Automatic spin-entangled decays of heavy resonances in Monte Carlo simulations
• Higgs boson gluon-fusion production in N3LO QCD
• Testing Electroweak Baryogenesis with Future Colliders
• Full top quark mass dependence in Higgs boson pair production at NLO
• Higgs boson pair production at NNLO with top quark mass effects
• Next-to-Leading order Higgs + 2 jet production via gluon fusion
• Higgs boson pair production in the D=6 extension of the SM
• Higgs production in association with bottom quarks
• Standard Model Higgs boson pair production in the $(b\bar{b})(b\bar{b})$ final state
• NLO QCD corrections to Higgs boson plus jet production with full top-quark mass dependence
• Differential Higgs Boson Pair Production at Next-to-Next-to-Leading Order in QCD
• Higgs Self-Coupling Measurements at a 100 TeV Hadron Collider
• Unrestored Electroweak Symmetry
• Revisiting the non-resonant Higgs pair production at the HL-LHC
• $hh+\text{jet}$ production at 100 TeV
• Top-Yukawa contributions to bbH production at the LHC
• Higgs-Precision Constraints on Colored Naturalness

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• The Gauge-Higgs Legacy of the LHC Run II
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• High Precision Higgs from High Energy Muon Colliders
• Higgs-boson-pair production $H(\to b\overline{b})H(\to \gamma \gamma )$ from gluon fusion at the HL-LHC and HL-100 TeV hadron collider
• Measuring the Higgs self-coupling via Higgs-pair production at a 100 TeV p-p collider
• Two-loop analysis of classically scale-invariant models with extended Higgs sectors
• RIP $Hb\bar{b}$: How other Higgs production modes conspire to kill a rare signal at the LHC
• CDF II $W$-mass anomaly faces first-order electroweak phase transition
• Measuring the trilinear Higgs boson self--coupling at the 100 TeV hadron collider via multivariate analysis
• The Muon Smasher's Guide
• Prospects of non-resonant di-Higgs searches and Higgs boson self-coupling measurement at the HE-LHC using machine learning techniques
• Baryogenesis from combined Higgs - scalar field inflation
• Anatomy of the $tthh$ Physics at HL-LHC
• Detecting New Physics as Novelty -- Complementarity Matters