Search for Higgs boson pair production in the $\gamma \gamma W{W}^{\ast }$ channel using $pp$ collision data recorded at $\sqrt{s}=13$ TeV with the ATLAS detector

Abstract

Searches for non-resonant and resonant Higgs boson pair production are performed in the $\gamma \gamma W{W}^{\ast }$ channel with the final state of $\gamma \gamma \ell \nu jj$ using 36.1 fb${}^{-1}$ of proton-proton collision data recorded at a centre-of-mass energy of $\sqrt{s}=13$ TeV by the ATLAS detector at the Large Hadron Collider. No significant deviation from the Standard Model prediction is observed. A 95% confidence-level observed upper limit of 7.7 pb is set on the cross section for non-resonant production, while the expected limit is 5.4 pb. A search for a narrow-width resonance $X$ decaying to a pair of Standard Model Higgs bosons $HH$ is performed with the same set of data, and the observed upper limits on $\sigma (pp\to X)\times B(X\to HH)$ range between 40.0 pb and 6.1 pb for masses of the resonance between 260 GeV and 500 GeV, while the expected limits range between 17.6 pb and 4.4 pb. When deriving the limits above, the Standard Model branching ratios of the $H\to \gamma \gamma$ and $H\to W{W}^{\ast }$ are assumed.

39 pages in total, author list starting page 23, 4 figures, 6 tables, published in EPJC. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2016-20/

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• Search for non-resonant Higgs boson pair production in the $bb\ell \nu \ell \nu$ final state with the ATLAS detector in $pp$ collisions at $\sqrt{s}=13$ TeV
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• Search for production of Higgs boson pairs in the four b quark final state using large-area jets in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Search for resonant pair production of Higgs bosons in the $b\bar{b}b\bar{b}$ final state using $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector
• Search for nonresonant Higgs boson pair production in the $\mathrm{b}\overline{\mathrm{b}}\mathrm{b}\overline{\mathrm{b}}$ final state at $\sqrt{s}=$ 13 TeV
• Beyond the Standard Model Effective Field Theory: The Singlet Extended Standard Model
• Disentangling new physics effects on non-resonant Higgs boson pair production from gluon fusion
• Updated constraints on Georgi-Machacek model, and its electroweak phase transition and associated gravitational waves
• ATLAS searches for additional scalars and exotic Higgs boson decays with the LHC Run 2 dataset
• Top-Assisted Di-Higgs boson Production Motivated by Baryogenesis
• Updated global fit of the aligned two-Higgs-doublet model with heavy scalars
• Prospects of non-resonant di-Higgs searches and Higgs boson self-coupling measurement at the HE-LHC using machine learning techniques
• Right Handed Neutrinos, TeV Scale BSM Neutral Higgs and FIMP Dark Matter in EFT Framework
• The Natural TeV Cutoff of the Higgs Field from the Multiplicative Lagrangian
• Resonant Multi-Scalar Production in the Generic Complex Singlet Model in the Multi-TeV Region
• A Simple Model of Dark Matter and CP Violation
• Search for pair production of boosted Higgs bosons via vector-boson fusion in the $b\bar{b}b\bar{b}$ final state using $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Signature of the Maximally Symmetric 2HDM via $W^{\pm }/Z$-Quadruplet Productions at the LHC
• Probing Electroweak Phase Transition in Extended Singlet Scalar Model with Resonant $HH$ production in $bbZZ$ Channel using Parameterized Machine Learning
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• QCD corrections to Higgs boson pair production and decay to the $b\bar{b}{\tau }^{+}{\tau }^{-}$ final state
• Prospects for exotic $h\to 4\tau$ decays in single and di-Higgs boson production at the LHC and future hadron colliders
• Light dark matter around 100 GeV from the inert doublet model
• Constraints on anomalous couplings of the Higgs boson from pair production searches
• Collider phenomenology of new neutral scalars in a flavoured multi-Higgs model
• Application of the matrix element method to Higgs boson pair production in the channel $\text{HH}\to \text{b}\bar{\text{b}}\text{W}{\text{W}}^{\ast }$ at the LHC