First Search for the $K_L \to \pi^0 \gamma$ Decay

Autor: 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, I., 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., 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., Shimizu, N., 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.

Publikováno v: Phys. Rev. D 102, 051103 (2020)

We report the first search for the $K_L \to \pi^0 \gamma$ 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\pm 0.3_{\rm stat.} \pm 1.6_{\rm syst.}

Externí odkaz: http://arxiv.org/abs/2006.14918

Search for $K_L \!\to\! \pi^0 \nu \overline{\nu}$ and $K_L \!\to\! \pi^0 X^0$ Decays at the J-PARC KOTO Experiment

Autor: KOTO Collaboration, Ahn, J. K., Beckford, B., Beechert, J., Bryant, K., Campbell, M., Chen, S. H., Comfort, J., Dona, K., Hara, N., Haraguchi, H., Hsiung, Y. B., Hutcheson, M., Inagaki, T., Kamiji, I., Kawasaki, N., Kim, E. J., Kim, J. L., Kim, Y. J., Ko, J. W., Komatsubara, T. K., Kotera, K., Kurilin, A. S., Lee, J. W., Lim, G. Y., Lin, C., Lin, Q., Luo, Y., Ma, J., Maeda, Y., Mari, T., Masuda, T., Matsumura, T., Mcfarland, D., McNeal, N., Micallef, J., Miyazaki, K., Murayama, R., Naito, D., Nakagiri, K., Nanjo, H., Nishimiya, H., Nomura, T., Ohsugi, M., Okuno, H., Sasaki, M., Sasao, N., Sato, K., Sato, T., Sato, Y., Schamis, H., Seki, S., Shimizu, N., Shimogawa, T., Shinkawa, T., Shinohara, S., Shiomi, K., Su, S., Sugiyama, Y., Suzuki, S., Tajima, Y., Taylor, M., Tecchio, M., Togawa, M., Tung, Y. C., Wah, Y. W., Watanabe, H., Woo, J. K., Yamanaka, T., Yoshida, H. Y.

Publikováno v: Phys. Rev. Lett. 122, 021802 (2019)

A search for the rare decay $K_L \!\to\! \pi^0 \nu \overline{\nu}$ was performed. With the data collected in 2015, corresponding to $2.2 \times 10^{19}$ protons on target, a single event sensitivity of $( 1.30 \pm 0.01_{\rm stat} \pm 0.14_{\rm syst}

Externí odkaz: http://arxiv.org/abs/1810.09655

A new search for the $K_{L} \to \pi^0 \nu \overline{\nu}$ and $K_{L} \to \pi^{0} X^{0}$ decays

Autor: Ahn, J. K., Baek, K. Y., Banno, S., Beckford, B., Brubaker, B., Cai, T., Campbell, M., Carruth, C., Chen, S. H., Chu, S., Comfort, J., Duh, Y. T., Furukawa, T., Haraguchi, H., Hineno, T., Hsiung, Y. B., Hutcheson, M., Inagaki, T., Isoe, M., Iwai, E., Kamibayashi, T., Kamiji, I., Kawasaki, N., Kim, E. J., Kim, Y. J., Ko, J. W., Komatsubara, T. K., Kurilin, A. S., Lee, G. H., Lee, H. S., Lee, J. W., Lee, S. K., Lim, G. Y., Lin, C., Ma, J., Maeda, Y., Masuda, T., Matsumura, T., Mcfarland, D., Micallef, J., Miyazaki, K., Morgan, K., Murayama, R., Naito, D., Nakagiri, K., Nakajima, Y., Nakaya, Y., Nanjo, H., Nomura, T., Odani, Y., Ogata, R., Okuno, H., Ota, T., Ri, Y. D., Sasaki, M., Sasao, N., Sato, K., Sato, T., Seki, S., Shimogawa, T., Shinkawa, T., Shinohara, S., Shiomi, K., Son, J. S., Stevens, J., Su, S., Sugiyama, Y., Suzuki, S., Tajima, Y., Takahashi, G., Takashima, Y., Tecchio, M., Teo, I., Togawa, M., Toyoda, T., Tung, Y. C., Usuki, T., Wah, Y. W., Watanabe, H., Whallon, N., Woo, J. K., Xu, J., Yamaga, M., Yamamoto, S., Yamanaka, T., Yamauchi, H., Yanagida, Y., Yokota, H., Yoshida, H. Y., Yoshimoto, H.

Publikováno v: Prog. Theor. Exp. Phys. (2017) 021C01

We searched for the $CP$-violating rare decay of neutral kaon, $K_{L} \to \pi^0 \nu \overline{\nu}$, in data from the first 100 hours of physics running in 2013 of the J-PARC KOTO experiment. One candidate event was observed while $0.34\pm0.16$ backg

Externí odkaz: http://arxiv.org/abs/1609.03637

Near threshold angular distributions of the $^2$H$(\gamma,\Lambda)$X reaction

Autor: Beckford, B., Bydzovsky, P., Chiba, A., Doi, D., Fujii, T., Fujii, Y., Futatsukawa, K., Gogami, T., Hashimoto, O., Han, Y. C., Hirose, K., Honda, R., Hosomi, K., Ishikawa, T., Kanda, H., Kaneta, M., Kaneko, Y., Kato, S., Kawama, D., Kimura, C., Kiyokawa, S., Koike, T., Maeda, K., Makabe, K., Matsubara, M., Miwa, K., Nagao, S., Nakamura, S. N., Okuyama, A., Shirotori, K., Sugihara, K., Suzuki, K., Tamae, T., Tamura, H., Tsukada, K., Yamamoto, F., Yamamoto, T. O., Yonemoto, Y., Yamazaki, H.

A study of the $^2$H$({\gamma},{\Lambda})$X reaction was performed using a tagged photon beam at the Research Center for Electron Photon Science (ELPH), Tohoku University. The photoproduced $\Lambda$ was measured in the $p{\pi^{-}}$ decay channel by

Externí odkaz: http://arxiv.org/abs/1308.1649

Report on strangeness photoproduction experiments performed with the Neutral Kaon Spectrometer 2

Autor: Beckford, B., Chiba, A., Doi, D., Fujibayashi, J., Fujii, T., Fujii, Y., Futatsukawa, K., Gogami, T., Hashimoto, O., Han, Y. C., Hirose, K., Hirose, S., Honda, R., Hosomi, K., Iguchi, A., Ishikawa, T., Kanda, H., Kaneta, M., Kaneko, Y., Kato, S., Kawama, D., Kawasaki, T., Kimura, C., Kiyokawa, S., Koike, T., Maeda, K., Makabe, K., Maruyama, N., Matsubara, M., Miwa, K., Miyagi, Y., Nagao, S., Nakamura, S. N., Okuyama, A., Shirotori, K., Sugihara, K., Suzuki, K., Tamae, T., Tamura, H., Terada, N., Tsukada, K., Yagi, K., Yamamoto, F., Yamamoto, T. O., Yamazaki, H., Yonemoto, Y.

An experiment designed to investigate the strangeness photoproduction process using a tagged photon beam in the energy range of 0.90 -1.08 GeV incident on a liquid deuterium target was successfully performed. The purpose of the experiment was to meas

Externí odkaz: http://arxiv.org/abs/1202.2748