Search for exotic Higgs boson decays H $\to$$\mathcal{AA}$ with $\mathcal{AA}$$\to$$γγ$ in events with a semi-merged topology in proton-proton collisions at $\sqrt{s}$ = 13 TeV

A search for exotic Higgs boson decays H $\to$$\mathcal{AA}$, with $\mathcal{A}$$\to$$γγ$ is presented, using events with a semi-merged topology. One of the hypothetical particles, $\mathcal{A}$, is assumed to decay promptly into a semi-merged diphoton system reconstructed as a single photon-like object, while the other $\mathcal{A}$ decays into two resolved photons. The search is performed using proton-proton collision data collected by the CMS experiment at $\sqrt{s}$ = 13 TeV, corresponding to an integrated luminosity of 138 fb$^{-1}$. The data agree with the standard model background expectation. Upper limits are set on the product of the Higgs boson production cross section and the branching fraction, $σ$(pp $\to$ H)$\mathcal{B}$(H $\to$$\mathcal{AA}$$\to$ 4$γ$), which range from 0.264 to 0.005 pb at 95% confidence level, for $\mathcal{A}$ masses in the range 1 $\lt$ $m_\mathcal{A}$ $\lt$ 15 GeV. These limits are the most stringent to date in the 1$-$5 GeV $m_\mathcal{A}$ range.

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Desy publication database (The Deutsches Elektronen-Synchrotron)
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2026-01-01
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Particle physics theoretical and experimental studies
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article
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article

Search for exotic Higgs boson decays H $\to$$\mathcal{AA}$ with $\mathcal{AA}$$\to$$γγ$ in events with a semi-merged topology in proton-proton collisions at $\sqrt{s}$ = 13 TeV

Maksym Titov, Giulia Paggi, Manami Kanemura, Eslam Shokr et al.
Desy publication database (The Deutsches Elektronen-Synchrotron)
Particle physics theoretical and experimental studies
article

Search for exotic Higgs boson decays H $\to$$\mathcal{AA}$ with $\mathcal{AA}$$\to$$γγ$ in events with a semi-merged topology in proton-proton collisions at $\sqrt{s}$ = 13 TeV

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article en

Abstract

A search for exotic Higgs boson decays H $\to$$\mathcal{AA}$, with $\mathcal{A}$$\to$$γγ$ is presented, using events with a semi-merged topology. One of the hypothetical particles, $\mathcal{A}$, is assumed to decay promptly into a semi-merged diphoton system reconstructed as a single photon-like object, while the other $\mathcal{A}$ decays into two resolved photons. The search is performed using proton-proton collision data collected by the CMS experiment at $\sqrt{s}$ = 13 TeV, corresponding to an integrated luminosity of 138 fb$^{-1}$. The data agree with the standard model background expectation. Upper limits are set on the product of the Higgs boson production cross section and the branching fraction, $σ$(pp $\to$ H)$\mathcal{B}$(H $\to$$\mathcal{AA}$$\to$ 4$γ$), which range from 0.264 to 0.005 pb at 95% confidence level, for $\mathcal{A}$ masses in the range 1 $\lt$ $m_\mathcal{A}$ $\lt$ 15 GeV. These limits are the most stringent to date in the 1$-$5 GeV $m_\mathcal{A}$ range.

Desy publication database (The Deutsches Elektronen-Synchrotron)
Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR), Université de Haute-Alsace (FR), Institut Pluridisciplinaire Hubert Curien (FR), CEA Paris-Saclay (FR), Centre de Calcul de l’Institut National de Physique Nucléaire et de Physique des Particules (FR), Institute of Nuclear Physics of Lyon (FR), Laboratoire Leprince-Ringuet (FR), Institut de Recherche sur les Lois Fondamentales de l'Univers (FR), Institut de Physique des 2 Infinis de Lyon (FR)
Openalex Percentile: Top 88%
Particle physics theoretical and experimental studies
Open Access PDFOpenAlex
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