Probing new physics in the Boosted $HH\to b\bar{b}\gamma \gamma$ channel at the LHC

Abstract

This paper presents the first dedicated study of the boosted $HH\to b\bar{b}\gamma \gamma$ topology as a key probe of physics beyond the Standard Model (SM) in the high-energy double-Higgs boson regime. The analysis presented in this paper, focuses on two classes of new-physics scenarios: non-resonant deviations of the quartic gauge--Higgs interaction, parameterized by the coupling modifier ${\kappa }_{2V}$, and resonant enhancement arising from the decay of a heavy scalar state, modeled within a two-Higgs-doublet framework. We demonstrate that the boosted reconstruction category enhances sensitivity to beyond SM effects that populate the high-$m_{HH}$ tail, yielding improved constraints on ${\kappa }_{2V}$ and extending the discovery reach for heavy resonances.

18 pages

References in corpus (24)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Measurement of the Higgs boson mass from the $H\to \gamma \gamma$ and $H\to Z{Z}^{\ast }\to 4\ell$ channels with the ATLAS detector using 25 fb${}^{-1}$ of $pp$ collision data
• New Angles on Energy Correlation Functions
• Vector-Boson Fusion Higgs Pair Production at N${}^3$LO
• $gg\to HH$: Combined Uncertainties
• Search for nonresonant Higgs boson pair production in final states with two bottom quarks and two photons in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Constraints on the Higgs boson self-coupling from single- and double-Higgs production with the ATLAS detector using $pp$ collisions at $\sqrt{s}=13$ TeV
• The Boosted Higgs Jet Reconstruction via Graph Neural Network
• Combined measurement of the Higgs boson mass from the $H\to \gamma \gamma$ and $H\to Z{Z}^{\ast }\to 4\ell$ decay channels with the ATLAS detector using $\sqrt{s}$ = 7, 8 and 13 TeV $pp$ collision data
• Combination of searches for Higgs boson pair production in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for nonresonant pair production of highly energetic Higgs bosons decaying to bottom quarks
• Precise predictions for double-Higgs production via vector-boson fusion
• Constraints on the Higgs boson self-coupling from the combination of single and double Higgs boson production in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Di-Higgs resonance searches in weak boson fusion
• Prospects of non-resonant di-Higgs searches and Higgs boson self-coupling measurement at the HE-LHC using machine learning techniques
• Studies of new Higgs boson interactions through nonresonant $HH$ production in the $b\bar{b}\gamma \gamma$ final state in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Measurement of the Higgs boson mass and width using the four-lepton final state in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• On the impact of selected modern deep-learning techniques to the performance and celerity of classification models in an experimental high-energy physics use case
• Improved constraints on Higgs boson self-couplings with quartic and cubic power dependencies of the cross section
• Combination of searches for resonant Higgs boson pair production using $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Enhancement of the double Higgs production via leptoquarks at the LHC
• Transforming jet flavour tagging at ATLAS