@article{7ae32d5f5a5f4bd7bd9f3ec60af25aed,
title = "First search for KL →π0γ",
abstract = "We report the first search for the KL→π0γ decay, which is forbidden by Lorentz invariance, using the data from 2016 to 2018 at the J-PARC KOTO experiment. With a single event sensitivity of (7.1±0.3stat±1.6syst)×10-8, no candidate event was observed in the signal region. The upper limit on the branching fraction was set to be 1.7×10-7 at the 90% confidence level.",
author = "{(KOTO Collaboration)} and N. Shimizu and Ahn, {J. K.} and B. Beckford and M. Campbell and Chen, {S. H.} and Choi, {J. M.} and J. Comfort and K. Dona and Farrington, {M. S.} and N. Hara and H. Haraguchi and Hsiung, {Y. B.} and M. Hutcheson and T. Inagaki and M. Isoe and I. Kamiji and Kim, {E. J.} and Kim, {J. L.} and Kim, {H. M.} and Komatsubara, {T. K.} and K. Kotera and Lee, {J. W.} and Lim, {G. Y.} and C. Lin and Lin, {Q. S.} and Y. Luo and T. Mari and T. Matsumura and D. McFarland and McNeal, {N. A.} and K. Miyazaki and R. Murayama and K. Nakagiri and H. Nanjo and H. Nishimiya and Y. Noichi and T. Nomura and T. Nunes and M. Ohsugi and H. Okuno and Redeker, {J. C.} and K. Sato and T. Sato and Y. Sato and T. Shimogawa and T. Shinkawa and S. Shinohara and K. Shiomi and R. Shiraishi and S. Su",
note = "Funding Information: We would like to express our gratitude to all members of the J-PARC Accelerator and Hadron Experimental Facility groups for their support. We also thank the KEK Computing Research Center for KEKCC and the National Institute of Information for SINET4. This work was supported by the Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan and the Japan Society for the Promotion of Science (JSPS) under the MEXT KAKENHI Grant No. JP18071006, the JSPS KAKENHI Grants No. JP23224007 and No. JP16H06343, by the research fellowship program for postdoctoral scientists No. 17J02178, and through the Japan–U.S. Cooperative Research Program in High Energy Physics; the U.S. Department of Energy, Office of Science, Office of High Energy Physics, under Awards No. DE-SC0006497, No. DE-SC0007859, and No. DE-SC0009798; the Ministry of Education and the Ministry of Science and Technology in Taiwan under Grants No. 104-2112-M-002-021, No. 105-2112-M-002-013 and No. 106-2112-M-002-016; and the National Research Foundation of Korea (2017R1A2B2011334 and 2019R1A2C1084552). Publisher Copyright: {\textcopyright} 2020 authors. Published by the American Physical Society.",
year = "2020",
month = sep,
doi = "10.1103/PhysRevD.102.051103",
language = "English",
volume = "102",
journal = "Physical Review D",
issn = "2470-0010",
publisher = "American Physical Society",
number = "5",
}