First search for K-L - pi(0)gamma

We report the first search for the K-L -> pi(0)gamma 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 +/- 0.3(stat) +/- 1.6(syst)) x 10(-8), no candidate event was observed in the signal region...

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Veröffentlicht in:	Physical review. D 2020-09, Vol.102 (5), Article 051103
Hauptverfasser:	Shimizu, N., Ahn, J. K., Beckford, B., Campbell, M., Chen, S. H., Choi, J. M., Comfort, J., Dona, K., Farrington, M. S., Hara, N., Haraguchi, H., Hsiung, Y. B., Hutcheson, M., Inagaki, T., Isoe, M., Kamiji, Kim, E. J., Kim, J. L., Kim, H. M., Komatsubara, T. K., Kotera, K., Lee, J. W., Lim, G. Y., Lin, C., Lin, Q. S., Luo, Y., Mari, T., Matsumura, T., Mcfarland, D., McNeal, N. A., Miyazaki, K., Murayama, R., Nakagiri, K., Nanjo, H., Nishimiya, H., Noichi, Y., Nomura, T., Nunes, T., Ohsugi, M., Okuno, H., Redeker, J. C., Sato, K., Sato, T., Sato, Y., Shimogawa, T., Shinkawa, T., Shinohara, S., Shiomi, K., Shiraishi, R., Su, S., Sugiyama, Y., Suzuki, S., Tajima, Y., Taylor, M., Tecchio, M., Togawa, M., Toyoda, T., Tung, Y. C., Vuong, Q. H., Wah, Y. W., Watanabe, H., Yamanaka, T., Yoshida, H. Y.
Format:	Artikel
Sprache:	eng
Schlagworte:	Astronomy & Astrophysics Physical Sciences Physics Physics, Particles & Fields Science & Technology
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Zusammenfassung:	We report the first search for the K-L -> pi(0)gamma 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 +/- 0.3(stat) +/- 1.6(syst)) x 10(-8), no candidate event was observed in the signal region. The upper limit on the branching fraction was set to be 1.7 x 10(-7) at the 90% confidence level.
ISSN:	2470-0010 2470-0029
DOI:	10.1103/PhysRevD.102.051103