| Autor: |
Collaboration, Super-Kamiokande, Takenaka, A., Abe, K., Bronner, C., Hayato, Y., Ikeda, M., Imaizumi, S., Ito, H., Kameda, J., Kataoka, Y., Kato, Y., Kishimoto, Y., Marti, Ll., Miura, M., Moriyama, S., Mochizuki, T., Nagao, Y., Nakahata, M., Nakajima, Y., Nakayama, S., Okada, T., Okamoto, K., Orii, A., Pronost, G., Sekiya, H., Shiozawa, M., Sonoda, Y., Suzuki, Y., Takeda, A., Takemoto, Y., Tanaka, H., Yano, T., Akutsu, R., Han, S., Kajita, T., Okumura, K., Tashiro, T., Wang, R., Xia, J., Bravo-Berguno, D., Labarga, L., Fernandez, P., Zaldivar, B., Blaszczyk, F. d. M., Kearns, E., Raaf, J. L., Stone, J. L., Wan, L., Wester, T., Pointon, B. W., Bian, J., Griskevich, N. J., Kropp, W. R., Locke, S., Mine, S., Smy, M. B., Sobel, H. W., Takhistov, V., Weatherly, P., Ganezer, K. S., Hill, J., Kim, J. Y., Lim, I. T., Park, R. G., Bodur, B., Scholberg, K., Walter, C. W., Coffani, A., Drapier, O., Hedri, S. El, Giampaolo, A., Gonin, M., Mueller, Th. A., Paganini, P., Quilain, B., Ishizuka, T., Nakamura, T., Jang, J. S., Learned, J. G., Matsuno, S., Anthony, L. H. V., Litchfield, R. P., Sztuc, A. A., Uchida, Y., Berardi, V., Catanesi, M. G., Radicioni, E., Calabria, N. F., Machado, L. N., De Rosa, G., Collazuol, G., Iacob, F., Lamoureux, M., Ospina, N., Ludovici, L., Nishimura, Y., Cao, S., Friend, M., Hasegawa, T., Ishida, T., Jakkapu, M., Kobayashi, T., Matsubara, T., Nakadaira, T., Nakamura, K., Oyama, Y., Sakashita, K., Sekiguchi, T., Tsukamoto, T., Hasegawa, M., Isobe, Y., Miyabe, H., Nakano, Y., Shiozawa, T., Sugimoto, T., Suzuki, A. T., Takeuchi, Y., Yamamoto, S., Ali, A., Ashida, Y., Feng, J., Hirota, S., Ichikawa, A. K., Jiang, M., Kikawa, T., Mori, M., Nakamura, KE., Nakaya, T., Wendell, R. A., Yasutome, K., McCauley, N., Mehta, P., Pritchard, A., Tsui, K. M., Fukuda, Y., Itow, Y., Menjo, H., Niwa, T., Sato, K., Taani, M., Tsukada, M., Mijakowski, P., Frankiewicz, K., Jung, C. K., Santucci, G., Vilela, C., Wilking, M. J., Yanagisawa, C., Fukuda, D., Harada, M., Hagiwara, K., Horai, T., Ishino, H., Ito, S., Koshio, Y., Ma, W., Piplani, N., Sakai, S., Sakuda, M., Takahira, Y., Xu, C., Kuno, Y., Barr, G., Barrow, D., Cook, L., Simpson, C., Wark, D., Nova, F., Boschi, T., Di Lodovico, F., Sedgwick, S. Molina, Zsoldos, S., Yang, J. Y., Jenkins, S. J., McElwee, J. M., Thiesse, M. D., Thompson, L. F., Okazawa, H., Choi, Y., Kim, S. B., Yu, I., Nishijima, K., Koshiba, M., Iwamoto, K., Ogawa, N., Yokoyama, M., Goldsack, A., Martens, K., Vagins, M. R., Kuze, M., Tanaka, M., Yoshida, T., Inomoto, M., Ishitsuka, M., Matsumoto, R., Ohta, K., Shinoki, M., Martin, J. F., Nantais, C. M., Tanaka, H. A., Towstego, T., Hartz, M., Konaka, A., de Perio, P., Prouse, N. W., Chen, S., Xu, B. D., Posiadala-Zezula, M., Richards, B., Jamieson, B., Walker, J., Minamino, A., Pintaudi, G., Sasaki, R. |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
Phys. Rev. D 102, 112011 (2020) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevD.102.112011 |
| Popis: |
We have searched for proton decay via $p\to e^+\pi^0$ and $p\to \mu^+\pi^0$ modes with the enlarged fiducial volume data of Super-Kamiokande from April 1996 to May 2018, which corresponds to 450 kton$\cdot$years exposure. We have accumulated about 25% more livetime and enlarged the fiducial volume of the Super-Kamiokande detector from 22.5 kton to 27.2 kton for this analysis, so that 144 kton$\cdot$years of data, including 78 kton$\cdot$years of additional fiducial volume data, has been newly analyzed. No candidates have been found for $p\to e^+\pi^0$ and one candidate remains for $p\to \mu^+\pi^0$ in the conventional 22.5 kton fiducial volume and it is consistent with the atmospheric neutrino background prediction. We set lower limits on the partial lifetime for each of these modes: $\tau/B(p\to e^+\pi^0) > 2.4 \times 10^{34}$ years and $\tau/B(p\to \mu^+\pi^0) > 1.6 \times 10^{34}$ years at 90% confidence level.
Comment: 16 pages, 10 figures |
| Databáze: |
arXiv |
| Externí odkaz: |
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