Search for proton decay via $p\to e^+π^0$ and $p\to μ^+π^0$ with an enlarged fiducial volume in Super-Kamiokande I-IV
Creators: name: Kamiokande Collaboration
name: Takenaka, A.
name: Abe, K.
name: Bronner, C.
name: Hayato, Y.
name: Ikeda, M.
name: Imaizumi, S.
name: Ito, H.
name: Kameda, J.
name: Kataoka, Y.
name: Kato, Y.
name: Kishimoto, Y.
name: Marti, Ll.
name: Miura, M.
name: Moriyama, S.
name: Mochizuki, T.
name: Nagao, Y.
name: Nakahata, M.
name: Nakajima, Y.
name: Nakayama, S.
name: Okada, T.
name: Okamoto, K.
name: Orii, A.
name: Pronost, G.
name: Sekiya, H.
name: Shiozawa, M.
name: Sonoda, Y.
name: Suzuki, Y.
name: Takeda, A.
name: Takemoto, Y.
name: Tanaka, H.
name: Yano, T.
name: Akutsu, R.
name: Han, S.
name: Kajita, T.
name: Okumura, K.
name: Tashiro, T.
name: Wang, R.
name: Xia, J.
name: Bravo-Berguno, D.
name: Labarga, L.
name: Fernandez, P.
name: Zaldivar, B.
name: Blaszczyk, F. d. M.
name: Kearns, E.
name: Raaf, J. L.
name: Stone, J. L.
name: Wan, L.
name: Wester, T.
name: Pointon, B. W.
name: Bian, J.
name: Griskevich, N. J.
name: Kropp, W. R.
name: Locke, S.
name: Mine, S.
name: Smy, M. B.
name: Sobel, H. W.
name: Takhistov, V.
name: Weatherly, P.
name: Ganezer, K. S.
name: Hill, J.
name: Kim, J. Y.
name: Lim, I. T.
name: Park, R. G.
name: Bodur, B.
name: Scholberg, K.
name: Walter, C. W.
name: Coffani, A.
name: Drapier, O.
name: Hedri, S. El
name: Giampaolo, A.
name: Gonin, M.
name: Mueller, Th. A.
name: Paganini, P.
name: Quilain, B.
name: Ishizuka, T.
name: Nakamura, T.
name: Jang, J. S.
name: Learned, J. G.
name: Matsuno, S.
name: Anthony, L. H. V.
name: Litchfield, R. P.
name: Sztuc, A. A.
name: Uchida, Y.
name: Berardi, V.
name: Catanesi, M. G.
name: Radicioni, E.
name: Calabria, N. F.
name: Machado, L. N.
name: De Rosa, G.
name: Collazuol, G.
name: Iacob, F.
name: Lamoureux, M.
name: Ospina, N.
name: Ludovici, L.
name: Nishimura, Y.
name: Cao, S.
name: Friend, M.
name: Hasegawa, T.
name: Ishida, T.
name: Jakkapu, M.
name: Kobayashi, T.
name: Matsubara, T.
name: Nakadaira, T.
name: Nakamura, K.
name: Oyama, Y.
name: Sakashita, K.
name: Sekiguchi, T.
name: Tsukamoto, T.
name: Hasegawa, M.
name: Isobe, Y.
name: Miyabe, H.
name: Nakano, Y.
name: Shiozawa, T.
name: Sugimoto, T.
name: Suzuki, A. T.
name: Takeuchi, Y.
name: Yamamoto, S.
name: Ali, A.
name: Ashida, Y.
name: Feng, J.
name: Hirota, S.
name: Ichikawa, A. K.
name: Jiang, M.
name: Kikawa, T.
name: Mori, M.
name: Nakamura, KE.
name: Nakaya, T.
name: Wendell, R. A.
name: Yasutome, K.
name: McCauley, N.
name: Mehta, P.
name: Pritchard, A.
name: Tsui, K. M.
name: Fukuda, Y.
name: Itow, Y.
name: Menjo, H.
name: Niwa, T.
name: Sato, K.
name: Taani, M.
name: Tsukada, M.
name: Mijakowski, P.
name: Frankiewicz, K.
name: Jung, C. K.
name: Santucci, G.
name: Vilela, C.
name: Wilking, M. J.
name: Yanagisawa, C.
name: Fukuda, D.
name: Harada, M.
name: Hagiwara, K.
name: Horai, T.
name: Ishino, H.
name: Ito, S.
name: Koshio, Y.
name: Ma, W.
name: Piplani, N.
name: Sakai, S.
name: Sakuda, M.
name: Takahira, Y.
name: Xu, C.
name: Kuno, Y.
name: Barr, G.
name: Barrow, D.
name: Cook, L.
name: Simpson, C.
name: Wark, D.
name: Nova, F.
name: Boschi, T.
name: Di Lodovico, F.
name: Sedgwick, S. Molina
name: Zsoldos, S.
name: Yang, J. Y.
name: Jenkins, S. J.
name: McElwee, J. M.
name: Thiesse, M. D.
name: Thompson, L. F.
name: Okazawa, H.
name: Choi, Y.
name: Kim, S. B.
name: Yu, I.
name: Nishijima, K.
name: Koshiba, M.
name: Iwamoto, K.
name: Ogawa, N.
name: Yokoyama, M.
name: Goldsack, A.
name: Martens, K.
name: Vagins, M. R.
name: Kuze, M.
name: Tanaka, M.
name: Yoshida, T.
name: Inomoto, M.
name: Ishitsuka, M.
name: Matsumoto, R.
name: Ohta, K.
name: Shinoki, M.
name: Martin, J. F.
name: Nantais, C. M.
name: Tanaka, H. A.
name: Towstego, T.
name: Hartz, M.
name: Konaka, A.
name: de Perio, P.
name: Prouse, N. W.
name: Chen, S.
name: Xu, B. D.
name: Posiadala-Zezula, M.
name: Richards, B.
name: Jamieson, B.
name: Walker, J.
name: Minamino, A.
name: Okamoto, K.
name: Pintaudi, G.
name: Sasaki, R.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We have searched for proton decay via $p\to e^+π^0$ and $p\to μ^+π^0$ 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 $p\to e^+π^0$ and one candidate remains for $p\to μ^+π^0$ 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: $τ/B(p\to e^+π^0) &gt; 2.4 \times 10^{34}$ years and $τ/B(p\to μ^+π^0) &gt; 1.6 \times 10^{34}$ years at 90% confidence level.
description: 16 pages, 10 figures