Search for a resonance decaying into a scalar particle and a Higgs boson in final states with leptons and two photons in proton-proton collisions at $\sqrt s=13$ TeV with the ATLAS detector
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| Format: | Preprint |
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2024
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| _version_ | 1866917870621949952 |
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| author | ATLAS Collaboration |
| author_facet | ATLAS Collaboration |
| contents | A search for a hypothetical heavy scalar particle, $X$, decaying into a singlet scalar particle, $S$, and a Standard Model Higgs boson, $H$, using 140 fb$^{-1}$ of proton-proton collision data at the centre-of-mass energy of 13 TeV recorded with the ATLAS detector at the LHC is presented. The explored mass range is $300 \leq m_X \leq 1000$ GeV and $170 \leq m_S \leq 500$ GeV. The signature of this search is one or two leptons ($e$ or $μ$) from the decay of vector bosons originating from the $S$ particle, $S \rightarrow W^{\pm}W^{\mp}/ZZ$, and two photons from the Higgs boson decay, $H\rightarrow γγ$. No significant excess is observed above the expected Standard Model background. The observed (expected) upper limits at the 95% confidence level on the cross-section for $gg\rightarrow X\rightarrow SH$, assuming the same $S\rightarrow WW/ZZ$ branching ratios as for a SM-like heavy Higgs boson, are between 530 (800) fb and 120 (170) fb. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2405_20926 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Search for a resonance decaying into a scalar particle and a Higgs boson in final states with leptons and two photons in proton-proton collisions at $\sqrt s=13$ TeV with the ATLAS detector ATLAS Collaboration High Energy Physics - Experiment A search for a hypothetical heavy scalar particle, $X$, decaying into a singlet scalar particle, $S$, and a Standard Model Higgs boson, $H$, using 140 fb$^{-1}$ of proton-proton collision data at the centre-of-mass energy of 13 TeV recorded with the ATLAS detector at the LHC is presented. The explored mass range is $300 \leq m_X \leq 1000$ GeV and $170 \leq m_S \leq 500$ GeV. The signature of this search is one or two leptons ($e$ or $μ$) from the decay of vector bosons originating from the $S$ particle, $S \rightarrow W^{\pm}W^{\mp}/ZZ$, and two photons from the Higgs boson decay, $H\rightarrow γγ$. No significant excess is observed above the expected Standard Model background. The observed (expected) upper limits at the 95% confidence level on the cross-section for $gg\rightarrow X\rightarrow SH$, assuming the same $S\rightarrow WW/ZZ$ branching ratios as for a SM-like heavy Higgs boson, are between 530 (800) fb and 120 (170) fb. |
| title | Search for a resonance decaying into a scalar particle and a Higgs boson in final states with leptons and two photons in proton-proton collisions at $\sqrt s=13$ TeV with the ATLAS detector |
| topic | High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2405.20926 |