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New Methods and Simulations for Cosmogenic Induced Spallation Removal in Super-Kamiokande-IV

Publication ,  Journal Article
Collaboration, S-K; Locke, S; Coffani, A; Abe, K; Bronner, C; Hayato, Y; Ikeda, M; Imaizumi, S; Ito, H; Kameda, J; Kataoka, Y; Miura, M ...
November 30, 2021

Radioactivity induced by cosmic muon spallation is a dominant source of backgrounds for $\mathcal{O}(10)~$MeV neutrino interactions in water Cherenkov detectors. In particular, it is crucial to reduce backgrounds to measure the solar neutrino spectrum and find neutrino interactions from distant supernovae. In this paper we introduce new techniques to locate muon-induced hadronic showers and efficiently reject spallation backgrounds. Applying these techniques to the solar neutrino analysis with an exposure of $2790\times22.5$~kton.day increases the signal efficiency by $12.6\%$, approximately corresponding to an additional year of detector running. Furthermore, we present the first spallation simulation at SK, where we model hadronic interactions using FLUKA. The agreement between the isotope yields and shower pattern in this simulation and in the data gives confidence in the accuracy of this simulation, and thus opens the door to use it to optimize muon spallation removal in new data with gadolinium-enhanced neutron capture detection.

Duke Scholars

Publication Date

November 30, 2021
 

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Collaboration, S.-K., Locke, S., Coffani, A., Abe, K., Bronner, C., Hayato, Y., … Sasaki, R. (2021). New Methods and Simulations for Cosmogenic Induced Spallation Removal in Super-Kamiokande-IV.
Collaboration, Super-Kamiokande, S. Locke, A. Coffani, K. Abe, C. Bronner, Y. Hayato, M. Ikeda, et al. “New Methods and Simulations for Cosmogenic Induced Spallation Removal in Super-Kamiokande-IV,” November 30, 2021.
Collaboration S-K, Locke S, Coffani A, Abe K, Bronner C, Hayato Y, et al. New Methods and Simulations for Cosmogenic Induced Spallation Removal in Super-Kamiokande-IV. 2021 Nov 30;
Collaboration S-K, Locke S, Coffani A, Abe K, Bronner C, Hayato Y, Ikeda M, Imaizumi S, Ito H, Kameda J, Kataoka Y, Miura M, Moriyama S, 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, Takenaka A, Tanaka H, Yano T, Hirade K, Kanemura Y, Miki S, Watabe S, Han S, Kajita T, Okumura K, Tashiro T, Xia J, Wang X, Megias GD, Bravo-Berguño D, Labarga L, Marti L, Zaldivar B, Pointon BW, Blaszczyk FDM, Kearns E, Raaf JL, Stone JL, Wan L, Wester T, Bian J, Griskevich NJ, Kropp WR, Mine S, Yankelevic A, Smy MB, Sobel HW, Takhistov V, Hill J, Kim JY, Lim IT, Park RG, Bodur B, Scholberg K, Walter CW, Bernard L, Drapier O, Hedri SE, Giampaolo A, Gonin M, Mueller TA, Paganini P, Quilain B, Santos AD, Ishizuka T, Nakamura T, Jang JS, Learned JG, Anthony LHV, Sztuc AA, Uchida Y, Martin D, Scott M, Berardi V, Catanesi MG, Radicioni E, Calabria NF, Machado LN, Rosa GD, Collazuol G, Iacob F, Lamoureux M, Ospina N, Mattiazzi M, Ludovici L, Nishimura Y, Maewaka Y, Cao S, Friend M, Hasegawa T, Ishida T, Kobayashi T, Jakkapu M, Matsubara T, Nakadaira T, Nakamura K, Oyama Y, Sakashita K, Sekiguchi T, Tsukamoto T, Nakano Y, Shiozawa T, Suzuki AT, Takeuchi Y, Yamamoto S, Kotsar Y, Ozaki H, Ali A, Ashida Y, Feng J, Hirota S, Ichikawa AK, Kikawa T, Mori M, Nakaya T, Wendell RA, Yasutome K, Fernandez P, McCauley N, Mehta P, Tsui KM, Fukuda Y, Itow Y, Menjo H, Niwa T, Sato K, Tsukada M, Mijakowski P, Lagoda J, Lakshmi SM, Zalipska J, Jung CK, Vilela C, Wilking MJ, Yanagisawa C, Jiang J, Hagiwara K, Harada M, Horai T, Ishino H, Ito S, Koshio Y, Ma W, Piplani N, Sakai S, Kitagawa H, Barr G, Barrow D, Cook L, Goldsack A, Samani S, Wark D, Nova F, Boschi T, Lodovico FD, Taani M, Zsoldos S, Gao J, Migenda J, Yang JY, Jenkins SJ, Malek M, McElwee JM, Stone O, Thiesse MD, Thompson LF, Okazawa H, Kim SB, Yu I, Seo JW, Nishijima K, Koshiba M, Iwamoto K, Ogawa N, Yokoyama M, Martens K, Vagins MR, Nakagiri K, Kuze M, Izumiyama S, Yoshida T, Inomoto M, Ishitsuka M, Matsumoto R, Ohta K, Shinoki M, Suganuma T, Kinoshita T, Martin JF, Tanaka HA, Towstego T, Akutsu R, Hartz M, Konaka A, Perio PD, Prouse NW, Chen S, Xu BD, Zhang Y, Posiadala-Zezula M, Richards B, Jamieson B, Walker J, Minamino A, Pintaudi G, Sasaki R. New Methods and Simulations for Cosmogenic Induced Spallation Removal in Super-Kamiokande-IV. 2021 Nov 30;

Publication Date

November 30, 2021