期刊
EUROPEAN PHYSICAL JOURNAL C
卷 82, 期 2, 页码 -出版社
SPRINGER
DOI: 10.1140/epjc/s10052-021-09878-z
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- ANPCyT, Argentina
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- ARC, Australia
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- NRC, Canada
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- CERN
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- CAS, China
- MOST, China
- NSFC, China
- Minciencias, Colombia
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- MPOCR, Czech Republic
- VSC CR, Czech Republic
- DNRF, Denmark
- DNSRC, Denmark
- IN2P3-CNRS, France
- CEA-DRF/IRFU, France
- SRNSFG, Georgia
- BMBF, Germany
- HGF, Germany
- MPG, Germany
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- HongKong SAR, China
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- Benoziyo Center, Israel
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- CNRST, Morocco
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- RCN, Norway
- MEiN, Poland
- FCT, Portugal
- MNE/IFA, Romania
- JINR
- MESofRussia, Russian Federation
- NRCKI, Russian Federation
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- MSSR, Slovakia
- ARRS , Slovenia
- MIZS, Slovenia
- DSI/NRF, South Africa
- MICINN, Spain
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- SERI,Switzerland
- SNSF, Switzerland
- Cantons of Bern, Switzerland
- Cantons of Geneva, Switzerland
- MOST, Taiwan
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- DOE, United States of America
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- Horizon 2020 and Marie Sklodowska-Curie Actions
- European Union
- Investissements d'Avenir Labex, France
- Investissements d'Avenir Idex, France
- ANR, France
- DFG, Germany
- AvH Foundation, Germany
- Herakleitos programme, Greece
- Thales programme, Greece
- Aristeia programme, Greece
- EU-ESF , Greece
- NSRF, Greece
- BSF-NSF, Israel
- GIF, Israel
- Norwegian FinancialMechanism 2014-2021, Norway
- NCN, Poland
- NAWA, Poland
- La CaixaBanking Foundation, Spain
- CERCA Programme Generalitat de Catalunya, Spain
- PROMETEO Programme, Spain
- GenT Programmes Generalitat Valenciana, Spain
- Goran Gustafssons Stiftelse, Sweden
- The Royal Society, United Kingdom
- Leverhulme Trust, United Kingdom
- Science and Technology Facilities Council [ST/S000879/1] Funding Source: researchfish
This paper presents a measurement of the electroweak production of two jets in association with a Z gamma pair, and a search for the invisible or partially invisible decays of a Higgs boson produced through vector boson fusion with a photon in the final state.
This paper presents a measurement of the electroweak production of two jets in association with a Z gamma pair, with the Z boson decaying into two neutrinos. It also presents a search for invisible or partially invisible decays of a Higgs boson with a mass of 125 GeV produced through vectorboson fusion with a photon in the final state. These results use data from LHC proton-proton collisions at root s = 13 TeV collected with the ATLAS detector and corresponding to an integated luminosity of 139 fb(-1). The event signature, shared by all benchmark processes considered for the measurements and searches, is characterized by a significant amount of unbalanced transverse momentum and a photon in the final state, in addition to a pair of forward jets. Electroweak Z gamma production in association with two jets is observed in this final state with a significance of 5.2 (5.1 expected) standard deviations. The measured fiducial cross-section for this process is 1.31 +/- 0.29 fb. An observed (expected) upper limit of 0.37 (0.34(-0.10)(+0.15)) at 95% confidence level is set on the branching ratio of a 125 GeV Higgs boson to invisible particles, assuming the Standard Model production cross-section. The signature is also interpreted in the context of decays of a Higgs boson into a photon and a dark photon. An observed (expected) 95% CL upper limit on the branching ratio for this decay is set at 0.018 (0.017(-0.005)(+0.007)), assuming the Standard Model production cross-section for a 125 GeV Higgs boson.
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