Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/139718
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Type: | Journal article |
Title: | Search for dark photons from Higgs boson decays via ZH production with a photon plus missing transverse momentum signature from pp collisions at √s = 13 TeV with the ATLAS detector |
Other Titles: | Search for dark photons from Higgs boson decays via ZH production with a photon plus missing transverse momentum signature from pp collisions at root s = 13 TeV with the ATLAS detector |
Author: | Aad, G. Abbott, B. Abbott, D.C. Abeling, K. Abidi, S.H. Aboulhorma, A. Abramowicz, H. Abreu, H. Abulaiti, Y. Abusleme Hoffman, A.C. Acharya, B.S. Adam Bourdarios, C. Adamczyk, L. Adamek, L. Addepalli, S.V. Adelman, J. Adiguzel, A. Adorni, S. Adye, T. Affolder, A.A. et al. |
Citation: | The Journal of High Energy Physics, 2023; 2023(7):133-0-133-50 |
Publisher: | Springer-Verlag |
Issue Date: | 2023 |
ISSN: | 1029-8479 1029-8479 |
Statement of Responsibility: | G. Aad ... M. Amerl ... E. K. Filmer ... P. Jackson ... A. X. Y. Kong ... H. Potti ... T. A. Ruggeri ... E. X. L. Ting ... M. J. White ... et al. (The ATLAS collaboration) |
Abstract: | This paper describes a search for dark photons (γd) in proton-proton collisions at s√ = 13 TeV at the Large Hadron Collider (LHC). The dark photons are searched for in the decay of Higgs bosons (H → γγd) produced through the ZH production mode. The transverse mass of the system, made of the photon and the missing transverse momentum from the non-interacting γd, presents a distinctive signature as it peaks near the Higgs boson mass. The results presented use the total Run-2 integrated luminosity of 139 fb⁻¹ recorded by the ATLAS detector at the LHC. The dominant reducible background processes are estimated using data-driven techniques. A Boosted Decision Tree technique is adopted to enhance the sensitivity of the search. As no excess is observed with respect to the Standard Model prediction, an observed (expected) upper limit on the branching ratio BR(H → γγd) of 2.28% (2.82+1.33−0.84%) is set at 95% CL for massless γd. For massive dark photons up to 40 GeV, the observed (expected) upper limits on BR(H → γγd) at 95% confidence level is found within the [2.19,2.52]% ([2.71,3.11]%) range. |
Keywords: | Hadron-Hadron Scattering |
Description: | Published: July 17, 2023 |
Rights: | Open Access, Copyright CERN, for the benefit of the ATLAS Collaboration. Article funded by SCOAP3. Open Access. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited. |
DOI: | 10.1007/JHEP07(2023)133 |
Grant ID: | ARC |
Published version: | http://dx.doi.org/10.1007/jhep07(2023)133 |
Appears in Collections: | Physics publications |
Files in This Item:
File | Description | Size | Format | |
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hdl_139718.pdf | Published version | 1.71 MB | Adobe PDF | View/Open |
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