A search for exotic Higgs boson decays H -> AA, with A -> gamma gamma is presented, using events with a semi-merged topology. One of the hypothetical particles, A, is assumed to decay promptly into a semi-merged diphoton system reconstructed as a single photon-like object, while the other 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, sigma(pp -> H) B(H -> AA -> 4 gamma), which range from 0.264 to 0.005 pb at 95% confidence level, for A masses in the range 1 < m_A < 15 GeV. These limits are the most stringent to date in the 1-5 GeV m_A range.

Search for exotic Higgs boson decays H → 𝒜𝒜 with 𝒜 → γγ in events with a semi-merged topology in proton-proton collisions at Ѵs =13 TeV / Null, N., Hayrapetyan, A., Makarenko, V., Tumasyan, A., Adam, W., Andrejkovic, J.W., Benato, L., Bergauer, T., Dragicevic, M., Giordano, C., Hussain, P.S., Jeitler, M., Krammer, N., Li, A., Liko, D., Matthewman, M., Mikulec, I., Schieck, J., Schöfbeck, R., Schwarz, D., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2026:7(2026 Jul), pp. 1-43. [10.1007/jhep07(2026)119]

Search for exotic Higgs boson decays H → 𝒜𝒜 with 𝒜 → γγ in events with a semi-merged topology in proton-proton collisions at Ѵs =13 TeV

Cunqueiro Mendez, L.;De Riggi, F.;Del Re, D.;Frosina, L.;Lombardi, F.;Organtini, G.;Palmeri, N.;Paramatti, R.;Rahatlou, S.;Santanastasio, F.;
2026

Abstract

A search for exotic Higgs boson decays H -> AA, with A -> gamma gamma is presented, using events with a semi-merged topology. One of the hypothetical particles, A, is assumed to decay promptly into a semi-merged diphoton system reconstructed as a single photon-like object, while the other 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, sigma(pp -> H) B(H -> AA -> 4 gamma), which range from 0.264 to 0.005 pb at 95% confidence level, for A masses in the range 1 < m_A < 15 GeV. These limits are the most stringent to date in the 1-5 GeV m_A range.
2026-07
beyond standard model; Hadron-Hadron scattering; Higgs physics; photon production
01 Pubblicazione su rivista::01a Articolo in rivista
Search for exotic Higgs boson decays H → ���� with �� → γγ in events with a semi-merged topology in proton-proton collisions at Ѵs =13 TeV / Null, N., Hayrapetyan, A., Makarenko, V., Tumasyan, A., Adam, W., Andrejkovic, J.W., Benato, L., Bergauer, T., Dragicevic, M., Giordano, C., Hussain, P.S., Jeitler, M., Krammer, N., Li, A., Liko, D., Matthewman, M., Mikulec, I., Schieck, J., Schöfbeck, R., Schwarz, D., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2026:7(2026 Jul), pp. 1-43. [10.1007/jhep07(2026)119]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1779592
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