A search for an exotic decay of the Higgs boson to a Z boson and a light pseudoscalar particle (a), decaying to a pair of leptons and a pair of photons, respectively, is presented. The search is based on proton-proton collision data at a center-of-mass energy of $\sqrt{s}$ = 13 TeV, collected with the CMS detector and corresponding to an integrated luminosity of 138 fb$^{-1}$. The analysis probes pseudoscalar masses $m_{a}$ between 1 and 30 GeV, leading to two pairs of well-isolated leptons and photons. Upper limits at 95% confidence level are set on the Higgs boson production cross section times its branching fraction to two leptons and two photons. The observed (expected) limits are in the range of 1.1-17.8 (1.7-17.9) fb within the probed $m_{a}$ interval. An excess of data above the expected standard model background with a local (global) significance of 2.6 (1.3) standard deviations is observed for a mass hypothesis of $m_{a}$ = 3 GeV. Limits on models involving axion-like particles, formulated as an effective field theory, are also reported.
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CMS
Collaboration
(2024).
Search for an exotic decay of the Higgs boson into a Z boson and a pseudoscalar particle in proton-proton collisions at $\sqrt{s}$ = 13 TeV. Phys.Lett.B 852 (2024) 138582.
Search for an exotic decay of the Higgs boson into a Z boson and a pseudoscalar particle in proton-proton collisions at $\sqrt{s}$ = 13 TeV. HEPData (collection).
https://doi.org/10.17182/hepdata.145073
or, if you prefer, a specific version of the
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CMS
Collaboration
(2023).
Search for an exotic decay of the Higgs boson into a Z boson and a pseudoscalar particle in proton-proton collisions at $\sqrt{s}$ = 13 TeV (Version 1). HEPData (collection).
https://doi.org/10.17182/hepdata.145073.v1
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CMS
Collaboration
(2023).
“Cross-section limits” of “Search for an exotic decay of the Higgs boson into a Z boson and a pseudoscalar particle in proton-proton collisions at $\sqrt{s}$ = 13 TeV” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.145073.v1/t1
CMS
Collaboration
(2023).
“Axion-like particles model limits” of “Search for an exotic decay of the Higgs boson into a Z boson and a pseudoscalar particle in proton-proton collisions at $\sqrt{s}$ = 13 TeV” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.145073.v1/t2
CMS
Collaboration
(2023).
“Signal efficiency times acceptance in electron channel” of “Search for an exotic decay of the Higgs boson into a Z boson and a pseudoscalar particle in proton-proton collisions at $\sqrt{s}$ = 13 TeV” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.145073.v1/t3
CMS
Collaboration
(2023).
“Signal efficiency times acceptance in muon channel” of “Search for an exotic decay of the Higgs boson into a Z boson and a pseudoscalar particle in proton-proton collisions at $\sqrt{s}$ = 13 TeV” (Version 1). HEPData (dataset).
https://doi.org/10.17182/hepdata.145073.v1/t4
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CMS
Collaboration
(2023).
“Abstract.txt” of “Search for an exotic decay of the Higgs boson into a Z boson and a pseudoscalar particle in proton-proton collisions at $\sqrt{s}$ = 13 TeV” (Version 1). HEPData (other).
https://doi.org/10.17182/hepdata.145073.v1/r1
When using this data, please cite the original publication:
CMS
Collaboration
(2024).
Search for an exotic decay of the Higgs boson into a Z boson and a pseudoscalar particle in proton-proton collisions at $\sqrt{s}$ = 13 TeV. Phys.Lett.B 852 (2024) 138582.
or, if you prefer, a specific version of the
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