Combination of searches for Higgs boson decays into a photon and a massless dark photon using pp collisions at √s = 13 TeV with the ATLAS detector
department or school: Science, Faculty of
department or school: TRIUMF
department or school: Non UBC
department or school: Physics and Astronomy, Department of
data provider: DSpace
identifier citation: Journal of High Energy Physics. 2024 Aug 20;2024(8):153
rights copyright: The Author(s)
creator: ATLAS Collaboration
issued: 2024-10-24T22:30:18Z
issued: 2024-08-20
description: A combination of searches for Higgs boson decays into a visible photon and a massless dark photon (H → γγd) is presented using 139 fb−1 of proton-proton collision data at a centre-of-mass energy of √ s = 13 TeV recorded by the ATLAS detector at the Large Hadron Collider. The observed (expected) 95% confdence level upper limit on the Standard Model Higgs boson decay branching ratio is determined to be B(H → γγd) < 1.3% (1.5)%. The search is also sensitive to higher-mass Higgs bosons decaying into the same fnal state. The observed (expected) 95% confdence level limit on the cross-section times branching ratio ranges from 16 fb (20 fb) for mH = 400 GeV to 1.0 fb (1.5 fb) for mH = 3 TeV. Results are also interpreted in the context of a minimal simplifed model.
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/89510
note: JHEP08(2024)153PuAlished for SISS Ay SpringerReceived: June 5, 2024Accepted: July 22, 2024Published: August 20, 2024Combination of searches for Higgs boson decays into aphoton and a massless dark photon using pp collisionsat √s = 13TeV with the ATLAS detectorThe ATLAS collaborationE-mail: atlas.publications@cern.chAbstract: A combination of searches for Higgs boson decays into a visible photon and amassless dark photon (H → γγd) is presented using 139 fb−1 of proton-proton collision dataat a centre-of-mass energy of√s = 13TeV recorded by the ATLAS detector at the LargeHadron Collider. The observed (expected) 95% confidence level upper limit on the StandardModel Higgs boson decay branching ratio is determined to be B(H → γγd) < 1.3% (1.5)%.The search is also sensitive to higher-mass Higgs bosons decaying into the same final state.The observed (expected) 95% confidence level limit on the cross-section times branching ratioranges from 16 fb (20 fb) for mH = 400GeV to 1.0 fb (1.5 fb) for mH = 3TeV. Results arealso interpreted in the context of a minimal simplified model.Keywords: Hadron-Hadron Scattering , Higgs PhysicsArXiv ePrint: 2406.01656Open Access, Copyright CERN,for the benefit of the ATLAS Collaboration.Article funded by SCOAP3.https://doi.org/10.1007/JHEP08(2024)153JHEP08(2024)153Contents1 Introduction 12 Description of the input analyses 33 Statistical combination 64 Results and interpretation 75 Conclusion 9The ATLAS collaboration 161 IntroductionThe existence of dark matter is supported by a series of astrophysical observations [1–8], butits unknown fundamental nature remains one of the central questions in particle physics. Thediscovery of a Higgs boson (H ) [9, 10] with a mass of 125GeV at the Large Hadron Collider(LHC) [11] has initiated an extensive effort aimed at investigating its possible connectionwith physics beyond the Standard Model (BSM). In particular, an upper limit of the orderof 10% on the undetected Higgs boson decay branching ratio [12, 13…
has type: Article
is shown at: 10.14288/1.0447115
language: eng
peer review status: Reviewed
provider: Vancouver : University of British Columbia Library
publisher: Springer Berlin Heidelberg
publisher DOI: 10.1007/JHEP08(2024)153
rights: Attribution 4.0 International (CC BY 4.0)
rights URI: http://creativecommons.org/licenses/by/4.0/
scholar level: Faculty
subject: Hadron-Hadron Scattering
subject: Higgs Physics
type: Text
identifier URI: http://hdl.handle.net/2429/89510