Compact Muon Solenoid
LHC, CERN
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| CMS-PAS-EXO-24-025 | ||
| Search for exotic Higgs boson decays $ H \to \mathcal{A}\mathcal{A} $ with $ \mathcal{A} \to \gamma\gamma $ in events with a partially merged topology in proton-proton collisions at $ \sqrt{s} = $ 13 TeV | ||
| CMS Collaboration | ||
| 2025-07-10 | ||
| Abstract: A search for an exotic decay of the Higgs boson to a pair of light pseudoscalars $ H \to \mathcal{A}\mathcal{A} $ with $ \mathcal{A} \to \gamma\gamma $ is presented, using events with a partially merged topology. One of the hypothetical particles $ \mathcal{A} $ is assumed to decay promptly into a semi-merged diphoton system reconstructed as a single photon-like object, while the other $ \mathcal{A} $ decays into two resolved photons. Proton-proton collision data collected by the CMS experiment at $ \sqrt{s} = $ 13 TeV, corresponding to an integrated luminosity of 138 fb$ ^{-1} $, are analyzed. Upper limits are set on the product of the Higgs boson production cross section and the branching fraction $ \mathcal{B}(H \to \mathcal{A}\mathcal{A} \to \gamma\gamma\gamma\gamma) $, which range from 0.264 to 0.008 pb at a 95% confidence level, for $ \mathcal{A} $ masses in the range 1 $ < m_{\mathcal{A}} < $ 15 GeV. | ||
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Links:
CDS record (PDF) ;
CADI line (restricted) ;
These preliminary results are superseded in this paper, Submitted to JHEP. The superseded preliminary plots can be found here. |
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Compact Muon Solenoid LHC, CERN |
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