Published March 13, 2023
| Version v1
Journal article
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Search for the Pair Production of Dark Particles $X$ with $K^0_L$ → $XX$, $X$ → $γγ$
Creators
- 1. University of Chicago
- 2. Korea University
- 3. Osaka University
- 4. National Taiwan University
- 5. High Energy Accelerator Research Organization
- 6. Kyoto University
- 7. Jeonbuk National University
Description
We present the first search for the pair production of dark particles $X$ via $K^0_L → XX$ with $X$ decaying into two photons using the data collected by the KOTO experiment. No signal was observed in the mass range of $40–110 MeV/c^2$ and $210–240 MeV/c^2$. This sets upper limits on the branching fractions as $ℬ(K^0_L→XX)<(1–4)×10^{−7}$ and $ℬ(K^0_L→XX)<(1–2)×10^{−6}$ at the 90% confidence level for the two mass regions, respectively.
Notes
Due to the large number of authors, only the first 20 and the University of Chicago authors are included on the above author list. Please download the article for the complete list of authors.
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PhysRevLett.130.111801.pdf
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Additional details
Identifiers
- DOI
- 10.1103/PhysRevLett.130.111801
- Other
- oai:uchicago.tind.io:14253
Funding
- Ministry of Education, Culture, Sports, Science, and Technology of Japana
- Japan Society for the Promotion of Science
- JP18071006
- Japan Society for the Promotion of Science
- JP23224007
- Japan Society for the Promotion of Science
- JP16H06343
- Japan Society for the Promotion of Science
- JP16H02184
- Japan Society for the Promotion of Science
- JP17K05479
- Japan Society for the Promotion of Science
- JP21H04995
- U.S. Department of Energy
- DE-SC0009798
- Ministry of Education and the Ministry of Science and Technology in Taiwan
- 104-2112-M-002-021
- Ministry of Education and the Ministry of Science and Technology in Taiwan
- 105-2112-M-002-013
- Ministry of Education and the Ministry of Science and Technology in Taiwan
- 106-2112-M-002-016
- National Research Foundation of Korea
- 2019R1A2C1084552
- National Research Foundation of Korea
- 2022R1A5A1030700