Search for a resonance decaying into a scalar particle and a Higgs boson in the fnal state with two bottom quarks and two photons in proton–proton collisions at √s = 13 TeV with the ATLAS detector
department or school: Science, Faculty of
department or school: TRIUMF
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department or school: Physics and Astronomy, Department of
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identifier citation: Journal of High Energy Physics. 2024 Nov 07;2024(11):47
rights copyright: The Author(s)
creator: ATLAS Collaboration
issued: 2024-12-10T23:36:07Z
issued: 2024-11-07
description: A search for the resonant production of a heavy scalar X decaying into a Higgs boson and a new lighter scalar S, through the process X → S(→ b b ¯ )H(→γγ), where the two photons are consistent with the Higgs boson decay, is performed. The search is conducted using an integrated luminosity of 140 fb−1 of proton-proton collision data at a centre-of-mass energy of 13 TeV recorded with the ATLAS detector at the Large Hadron Collider. The search is performed over the mass range 170 ≤ mX ≤ 1000 GeV and 15 ≤ mS ≤ 500 GeV. Parameterised neural networks are used to enhance the signal purity and to achieve continuous sensitivity in a domain of the (mX, mS) plane. No significant excess above the expected background is found and 95% CL upper limits are set on the cross section times branching ratio, ranging from 39 fb to 0.09 fb. The largest deviation from the background-only expectation occurs for (mX, mS) = (575, 200) GeV with a local (global) significance of 3.5 (2.0) standard deviations.
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/89828
note: JHEP11(2024)047PuAlished for SISS Ay SpringerReceived: April 22, 2024Accepted: September 30, 2024Published: November 7, 2024Search for a resonance decaying into a scalar particleand a Higgs boson in the final state with two bottomquarks and two photons in proton–proton collisions at√s = 13TeV with the ATLAS detectorThe ATLAS collaborationE-mail: atlas.publications@cern.chAbstract: A search for the resonant production of a heavy scalar X decaying into a Higgsboson and a new lighter scalar S, through the process X → S(→bb¯)H(→γγ), where the twophotons are consistent with the Higgs boson decay, is performed. The search is conducted usingan integrated luminosity of 140 fb−1 of proton-proton collision data at a centre-of-mass energyof 13TeV recorded with the ATLAS detector at the Large Hadron Collider. The search isperformed over the mass range 170 ≤ mX ≤ 1000GeV and 15 ≤ mS ≤ 500GeV. Parameterisedneural networks are used to enhance the signal purity and to achieve continuous sensitivityin a domain of the (mX , mS) plane. No significant excess above the expected background isfound and 95% CL upper limits are set on the cross section times branching ratio, rangingfrom 39 fb to 0.09 fb. The largest deviation from the background-only expectation occurs for(mX , mS) = (575, 200) GeV with a local (global) significance of 3.5 (2.0) standard deviations.Keywords: Hadron-Hadron Scattering, Beyond Standard Model, Higgs Physics,Hadron-Hadron scatteringArXiv ePrint: 2404.12915Open Access, Copyright CERN,for the benefit of the ATLAS Collaboration.Article funded by SCOAP3.https://doi.org/10.1007/JHEP11(2024)047JHEP11(2024)047Contents1 Introduction 12 ATLAS detector 33 Data and simulated event samples 44 Object definitions 65 Analysis strategy 85.1 Event preselection 85.2 Signal region definitions 95.3 Final signal-to-background discriminant 95.4 Signal interpolation 106 Background estimation 116.1 Non-resonant diphoton background 126.2 Higgs boson processes 137 Systematic uncertaintie…
has type: Article
is shown at: 10.14288/1.0447441
language: eng
peer review status: Reviewed
provider: Vancouver : University of British Columbia Library
publisher: Springer Berlin Heidelberg
publisher DOI: 10.1007/JHEP11(2024)047
rights: Attribution 4.0 International (CC BY 4.0)
rights URI: http://creativecommons.org/licenses/by/4.0/
scholar level: Faculty
scholar level: Researcher
subject: Hadron-Hadron Scattering
subject: Beyond Standard Model
subject: Higgs Physics
subject: Hadron-Hadron scattering
type: Text
identifier URI: http://hdl.handle.net/2429/89828