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Sensitivity of an early dark matter search using the electromagnetic calorimeter as a target for the Light Dark Matter eXperiment

Åkesson, T. LU orcid ; Bryngemark, L.K. LU ; Elén, E. LU orcid ; Herde, H. LU orcid ; Pico, L.S. LU orcid ; Pöttgen, R. LU orcid ; Wallin, E. LU and Zhang, D. (2025) In Journal of High Energy Physics 2025(12).
Abstract
The Light Dark Matter eXperiment (LDMX) is proposed to employ a thin tungsten target and a multi-GeV electron beam to carry out a missing momentum search for the production of dark matter candidate particles. We study the sensitivity for a complementary missing-energy-based search using the LDMX Electromagnetic Calorimeter as an active target with a focus on early running. In this context, we construct an event selection from a limited set of variables that projects sensitivity into previously-unexplored regions of light dark matter phase space — down to an effective dark photon interaction strength y of approximately 2 × 10−13 (5 × 10−12) for a 1 MeV (10 MeV) dark matter candidate mass. © The Author(s) 2025.
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author collaboration
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Dark Matter, Fixed Target Experiments
in
Journal of High Energy Physics
volume
2025
issue
12
article number
150
publisher
Springer
external identifiers
  • scopus:105027254688
ISSN
1029-8479
DOI
10.1007/JHEP12(2025)150
language
English
LU publication?
yes
id
158bbf9c-0095-46b8-8c3a-4d5ca3a3ca98
date added to LUP
2026-03-23 16:46:02
date last changed
2026-03-23 16:46:31
@article{158bbf9c-0095-46b8-8c3a-4d5ca3a3ca98,
  abstract     = {{The Light Dark Matter eXperiment (LDMX) is proposed to employ a thin tungsten target and a multi-GeV electron beam to carry out a missing momentum search for the production of dark matter candidate particles. We study the sensitivity for a complementary missing-energy-based search using the LDMX Electromagnetic Calorimeter as an active target with a focus on early running. In this context, we construct an event selection from a limited set of variables that projects sensitivity into previously-unexplored regions of light dark matter phase space — down to an effective dark photon interaction strength y of approximately 2 × 10−13 (5 × 10−12) for a 1 MeV (10 MeV) dark matter candidate mass. © The Author(s) 2025.}},
  author       = {{Åkesson, T. and Bryngemark, L.K. and Elén, E. and Herde, H. and Pico, L.S. and Pöttgen, R. and Wallin, E. and Zhang, D.}},
  issn         = {{1029-8479}},
  keywords     = {{Dark Matter; Fixed Target Experiments}},
  language     = {{eng}},
  number       = {{12}},
  publisher    = {{Springer}},
  series       = {{Journal of High Energy Physics}},
  title        = {{Sensitivity of an early dark matter search using the electromagnetic calorimeter as a target for the Light Dark Matter eXperiment}},
  url          = {{http://dx.doi.org/10.1007/JHEP12(2025)150}},
  doi          = {{10.1007/JHEP12(2025)150}},
  volume       = {{2025}},
  year         = {{2025}},
}