Sensitivity of an early dark matter search using the electromagnetic calorimeter as a target for the Light Dark Matter eXperiment
A bstract 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.
Authors
- D. G. Hitlin (ORCID: https://orcid.org/0000-0003-4028-6982)
- L. Tompkins (ORCID: https://orcid.org/0000-0001-8127-9653)
- A. P. Furmanski (ORCID: https://orcid.org/0000-0003-3608-7454)
- R. Ehrlich (ORCID: https://orcid.org/0000-0003-3131-7994)
- C. Mantilla (ORCID: https://orcid.org/0000-0002-0177-5903)
- E. C. Dukes (ORCID: https://orcid.org/0000-0001-8457-050X)
- Xinyi Xu (ORCID: https://orcid.org/0009-0005-5685-6734)
- B. Echenard (ORCID: https://orcid.org/0000-0002-3866-9370)
- L. Bryngemark (ORCID: https://orcid.org/0000-0002-8420-3408)
- T. P. A. Åkesson (ORCID: https://orcid.org/0000-0003-4141-5408)
- Philip Schuster (ORCID: https://orcid.org/0000-0002-6959-8974)
- Emrys Peets
- Danyi Zhang
- S. Middleton (ORCID: https://orcid.org/0000-0003-3380-5908)
- Steven J. Metallo
- R. C. Group (ORCID: https://orcid.org/0000-0002-4097-5254)
- C. Grieco (ORCID: https://orcid.org/0000-0002-3955-4399)
- Thomas Eichlersmith
- V. Dutta (ORCID: https://orcid.org/0000-0001-5958-829X)
- Yuxuan Wang (ORCID: https://orcid.org/0000-0001-9117-0619)
- Amina Li
- Elizabeth Berzin (ORCID: https://orcid.org/0000-0002-6279-9829)
- P. Masterson (ORCID: https://orcid.org/0000-0002-6890-7624)
- E. J. Wallin (ORCID: https://orcid.org/0000-0002-4848-5540)
- Tyler Horoho (ORCID: https://orcid.org/0000-0003-0117-4814)
- T. Nelson (ORCID: https://orcid.org/0000-0002-5005-7617)
- Zihan Ma (ORCID: https://orcid.org/0009-0007-6127-9534)
- Gordan Krnjaic (ORCID: https://orcid.org/0000-0001-7420-9577)
- Víctor Gómez-Rivera (ORCID: https://orcid.org/0009-0003-9025-6121)
- Einar Elén
- Luis Sarmiento Pico
- Natalia Toro (ORCID: https://orcid.org/0000-0002-8150-3990)
- H. Herde (ORCID: https://orcid.org/0000-0001-8926-6734)
- Chris Sellgren
- Nhan Viet Tran (ORCID: https://orcid.org/0000-0002-8440-6854)
- Andrew Whitbeck
- J. M. Muse (ORCID: https://orcid.org/0000-0002-2585-3793)
- Matt Graham
- Joseph Incandela
- J. Mans (ORCID: https://orcid.org/0000-0003-2840-1087)
- Wesley Ketchum (ORCID: https://orcid.org/0000-0002-6179-4874)
- Asahi Jige
- Duncan Wilmot
- L. Brennan (ORCID: https://orcid.org/0000-0003-0636-1846)
- T. C. Herwig (ORCID: https://orcid.org/0000-0002-4280-6382)
- Pierfrancesco Butti
- Jessica Pascadlo (ORCID: https://orcid.org/0009-0006-7686-2960)
- T. Á. Vámi (ORCID: https://orcid.org/0000-0002-0959-9211)
- James Oyang
- Ruth Pöttgen
- C. Bravo (ORCID: https://orcid.org/0000-0003-1102-8247)
- Filippo Delzanno
- Nathan Jay
- Sanjit Masanam
Institutions
- California Institute of Technology (US)
- Fermi National Accelerator Laboratory (US)
- University of California, Santa Barbara (US)
- Lund University (SE)
- University of Michigan (US)
- University of Minnesota System (US)
- SLAC National Accelerator Laboratory (US)
- University of Virginia (US)
- Carnegie Mellon University (US)
- Stanford University (US)
Publication Details
- Journal
- Journal of High Energy Physics
- Published
- 2025-12-19
- DOI
- https://doi.org/10.1007/jhep12(2025)150
- Citations
- 1
- Primary Topic
- Dark Matter and Cosmic Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 1.87
Funders
- National Science Foundation
- U.S. Department of Energy
- L'Oreal USA
- California Institute of Technology
- Lunds Universitet
- Knut och Alice Wallenbergs Stiftelse
- Vetenskapsrådet
- Office of Science
- University of California, Santa Barbara
- Materials Research Science and Engineering Center, Harvard University
- Division of Materials Research
- High Energy Physics
- Laboratory Directed Research and Development
- California NanoSystems Institute
- Fermilab