Compact Muon Solenoid
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| CMS-PAS-B2G-23-007 | ||
| Search for heavy scalar resonances decaying to a Higgs and a Higgs-like boson in the Lorentz-boosted $ \mathrm{b\overline{b}}4\mathrm{q} $ final state | ||
| CMS Collaboration | ||
| 2025-07-11 | ||
| Abstract: A search is performed for a heavy scalar resonance X decaying to a Higgs boson (H) and Higgs-like scalar boson (Y) in the $ \mathrm{H}\to\mathrm{b\overline{b}} $ and $ \mathrm{Y}\to\mathrm{VV}\to4\mathrm{q} $ final state, where q denotes a quark. Masses of the X boson between 900 and 4000 GeV and the Y between 60 and 2800 GeV are considered. The search is performed in data collected by the CMS experiment at the LHC from proton-proton collisions at 13 TeV center-of-mass energy, with a dataset corresponding to a total luminosity of 138 fb$ ^{-1} $. It targets the Lorentz-boosted regime, in which the products of the $ \mathrm{H}\to\mathrm{b\overline{b}} $ decay can be reconstructed as a single large-area jet, and those from the $ \mathrm{Y}\to\mathrm{q\overline{q}} $ decay as either one $ \mathrm{Y}\to4\mathrm{q} $ or two $ \mathrm{Y}\to\mathrm{q\overline{q}} $ jets. It exploits machine-learning-based jet identification and mass reconstruction algorithms, including a novel attention-based "particle transformer" for $ \mathrm{Y}\to4\mathrm{q} $ discrimination. No significant excess is observed in the data above the standard model background expectation and upper limits as low as 0.2 fb are derived at 95% confidence level for various mass points. This is the first search at the LHC for scalar resonances in the all-hadronic $ \mathrm{b\overline{b}}\mathrm{VV} $ final state. | ||
| Links: CDS record (PDF) ; CADI line (restricted) ; | ||
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Compact Muon Solenoid LHC, CERN |
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