Search for the Pair Production of Dark Particles $X$ with $K^0_L$ → $XX$, $X$ → $γγ$
Lin, C.; Ahn, J. K.; Choi, J. M.; Farrington, M. S.; Gonzalez, M.; Grethen, N.; Hsiung, Y. B.; Inagaki, T.; Kamiji, I.; Kim, E. J.; Kim, J. L.; Kim, H. M.; Kawata, K.; Kitagawa, A.; Komatsubara, T. K.; Kotera, K.; Lee, S. K.; Lee, J. W.; Lim, G. Y.; Luo, Y.; Redeker, J. C.; Sasse, V.; Wah, Y. W.
2023

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Abstract

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.

Details

Title
Search for the Pair Production of Dark Particles $X$ with $K^0_L$ → $XX$, $X$ → $γγ$
Author
Lin, C. : University of Chicago : (https://orcid.org/0000-0001-9128-0527)
Ahn, J. K. : Korea University
Choi, J. M. : Korea University
Farrington, M. S. : University of Chicago
Gonzalez, M. : Osaka University
Grethen, N. : University of Chicago
Hsiung, Y. B. : National Taiwan University : (https://orcid.org/0000-0003-4801-1238)
Inagaki, T. : High Energy Accelerator Research Organization
Kamiji, I. : Kyoto University
Kim, E. J. : Jeonbuk National University : (https://orcid.org/0000-0003-1433-6018)
Kim, J. L. : Jeonbuk National University
Kim, H. M. : Jeonbuk National University
Kawata, K. : Osaka University
Kitagawa, A. : Osaka University
Komatsubara, T. K. : High Energy Accelerator Research Organization : (https://orcid.org/0000-0002-6471-2897)
Kotera, K. : Osaka University
Lee, S. K. : Jeonbuk National University
Lee, J. W. : Korea University
Lim, G. Y. : High Energy Accelerator Research Organization
Luo, Y. : University of Chicago
Redeker, J. C. : University of Chicago
Sasse, V. : University of Chicago
Wah, Y. W. : University of Chicago : (https://orcid.org/0000-0002-2311-4444)
Content Type
Article
Published in
Physical Review Letters
Identifier(s)
DOI: https://doi.org/10.1103/PhysRevLett.130.111801
Funding Information
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
Publication Date
2023-03-13
Language
English
Copyright Statement
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
Licensing
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.
Record Appears in
Physical Sciences Division > Enrico Fermi Institute
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Record Created
2024-12-13

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