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Pulse Shape Discrimination in JSNS 2

Dodo, T. [Tohoku University, Sendai (Japan); Advanced Science Research Center, Japan Atomic Energy Agency (JAEA), Ibaraki (Japan); et al.]·Cheoun, M K [Department of Physics and Origin of Matter and Evolution of Galaxies (OMEG Institute), Soongsil University , 369 Sangdo-ro, Dongjak-gu, Seoul 06978 ,]·Choi, J H [Laboratory for High Energy Physics, Dongshin University , 67, Dongshindae-gil, Naju-si, Jeollanam-do, 58245 ,]·Choi, J Y [Department of Fire Safety, Seoyeong University , 1 Seogang-ro, Buk-gu, Gwangju 61268 ,]·Goh, J [Department of Physics, Kyung Hee University , 26, Kyungheedae-ro, Dongdaemun-gu, Seoul 02447 ,]·Haga, K [J-PARC Center, Japan Atomic Energy Agency (JAEA) , 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195 ,]·Harada, M [J-PARC Center, Japan Atomic Energy Agency (JAEA) , 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195 ,]·Hasegawa, S [Advanced Science Research Center, Japan Atomic Energy Agency (JAEA) , 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195 ,; J-PARC Center, Japan Atomic Energy Agency (JAEA) , 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195 ,]·Hwang, W [Department of Physics, Kyung Hee University , 26, Kyungheedae-ro, Dongdaemun-gu, Seoul 02447 ,]·Iida, T [Faculty of Pure and Applied Sciences, University of Tsukuba , Tennodai 1-1-1, Tsukuba, Ibaraki 305-8571 ,]·Jang, H I [Department of Fire Safety, Seoyeong University , 1 Seogang-ro, Buk-gu, Gwangju 61268 ,]·Jang, J S [Department of Physics and Photon Science, Gwangju Institute of Science and Technology , 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005 ,]·Joo, K K [Department of Physics, Chonnam National University , 77, Yongbong-ro, Buk-gu, Gwangju 61186 ,]·Jung, D E [Department of Physics, Sungkyunkwan University , 2066, Seobu-ro, Jangan-gu, Suwon-si, Gyeonggi-do 16419 ,]·Kang, S K [School of Liberal Arts, Seoul National University of Science and Technology , 232 Gongneung-ro, Nowon-gu, Seoul 139-743 ,]·Kasugai, Y [J-PARC Center, Japan Atomic Energy Agency (JAEA) , 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195 ,]·Kawasaki, T [Department of Physics, Kitasato University , 1 Chome-15-1 Kitazato, Minami Ward, Sagamihara, Kanagawa 252-0329 ,]·Kim, E J [Division of Science Education, Jeonbuk National University , 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896 ,]·Kim, J Y [Department of Physics, Chonnam National University , 77, Yongbong-ro, Buk-gu, Gwangju 61186 ,]·Kim, S B [School of Physics, Sun Yat-sen (Zhongshan) University , Haizhu District, Guangzhou 510275 ,]·Kim, W [Department of Physics, Kyungpook National University , 80 Daehak-ro, Buk-gu, Daegu 41566 ,]·Kinoshita, H [J-PARC Center, Japan Atomic Energy Agency (JAEA) , 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195 ,]·Konno, T [Department of Physics, Kitasato University , 1 Chome-15-1 Kitazato, Minami Ward, Sagamihara, Kanagawa 252-0329 ,]·Lee, D H [Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK) , 1-1 Oho, Tsukuba, Ibaraki 305-0801 ,]·Lim, I T [Department of Physics, Chonnam National University , 77, Yongbong-ro, Buk-gu, Gwangju 61186 ,]·Little, C [Physics Department, University of Michigan , 500 S. State Street, Ann Arbor, MI 48109 ,]·Marzec, E [Physics Department, University of Michigan , 500 S. State Street, Ann Arbor, MI 48109 ,]·Maruyama, T [Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK) , 1-1 Oho, Tsukuba, Ibaraki 305-0801 ,]·Masuda, S [J-PARC Center, Japan Atomic Energy Agency (JAEA) , 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195 ,]·Meigo, S [J-PARC Center, Japan Atomic Energy Agency (JAEA) , 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195 ,]·Moon, D H [Department of Physics, Chonnam National University , 77, Yongbong-ro, Buk-gu, Gwangju 61186 ,]·Nakano, T [Research Center for Nuclear Physics, Osaka University , 10-1 Mihogaoka, Ibaraki, Osaka 567-0047 ,]·Niiyama, M [Department of Physics, Kyoto Sangyo University , Motoyama, Kamigamo, Kita-Ku, Kyoto-City 603-8555 ,]·Nishikawa, K [Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK) , 1-1 Oho, Tsukuba, Ibaraki 305-0801 ,]·Pac, M Y [Laboratory for High Energy Physics, Dongshin University , 67, Dongshindae-gil, Naju-si, Jeollanam-do, 58245 ,]·Park, H W [Department of Physics, Chonnam National University , 77, Yongbong-ro, Buk-gu, Gwangju 61186 ,]·Park, J S [Department of Physics, Kyungpook National University , 80 Daehak-ro, Buk-gu, Daegu 41566 ,]·Park, R G [Department of Physics, Chonnam National University , 77, Yongbong-ro, Buk-gu, Gwangju 61186 ,]·Peeters, S J M [Department of Physics and Astronomy, University of Sussex , Sussex House, Falmer, Brighton BN1 9RH ,]·Rott, C [Department of Physics and Astronomy, University of Utah , 201 Presidents’ Cir, Salt Lake City, UT 84112 ,]·Sakai, K [J-PARC Center, Japan Atomic Energy Agency (JAEA) , 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195 ,]·Sakamoto, S [J-PARC Center, Japan Atomic Energy Agency (JAEA) , 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195 ,]·Shima, T [Research Center for Nuclear Physics, Osaka University , 10-1 Mihogaoka, Ibaraki, Osaka 567-0047 ,]·Shin, C D [Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK) , 1-1 Oho, Tsukuba, Ibaraki 305-0801 ,]·Spitz, J [Physics Department, University of Michigan , 500 S. State Street, Ann Arbor, MI 48109 ,]·Suekane, F [Research Center for Neutrino Science, Tohoku University , 6-3 Azaaoba, Aramaki, Aoba-ku, Sendai 980-8578 ,]·Sugaya, Y [Research Center for Nuclear Physics, Osaka University , 10-1 Mihogaoka, Ibaraki, Osaka 567-0047 ,]·Suzuya, K [J-PARC Center, Japan Atomic Energy Agency (JAEA) , 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195 ,]·Takeuchi, Y [Faculty of Pure and Applied Sciences, University of Tsukuba , Tennodai 1-1-1, Tsukuba, Ibaraki 305-8571 ,]·Yamaguchi, Y [J-PARC Center, Japan Atomic Energy Agency (JAEA) , 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195 ,]·Yeh, M [Neutrino and Nuclear Chemistry, Brookhaven National Laboratory , Upton, NY 11973-5000 ,]·Yeo, I S [Laboratory for High Energy Physics, Dongshin University , 67, Dongshindae-gil, Naju-si, Jeollanam-do, 58245 ,]·Yoo, C [Department of Physics, Kyung Hee University , 26, Kyungheedae-ro, Dongdaemun-gu, Seoul 02447 ,]·Yu, I [Department of Physics, Sungkyunkwan University , 2066, Seobu-ro, Jangan-gu, Suwon-si, Gyeonggi-do 16419 ,]
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Abstract

JSNS 2 (J-PARC Sterile Neutrino Search at J-PARC Spallation Neutron Source) is an experiment that is searching for sterile neutrinos via the observation of $\overline{ν}$ μ → $\overline{ν}$ e appearance oscillations using neutrinos from muon decay-at-rest. For this search, rejecting cosmic-ray-induced neutron events by Pulse Shape Discrimination (PSD) is essential because the JSNS2 detector is located above ground, on the third floor of the building. We have achieved 94.95% ± 0.15% rejection of neutron events while keeping 92.82% ± 1.77% of signal, electron-like events using a data-driven likelihood method. This article will report the PSD technique using the full fiducial volume of the JSNS2 detector.

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BibTeXRIS

Dodo, T. [Tohoku University, Sendai (Japan); Advanced Science Research Center, Japan Atomic Energy Agency (JAEA), Ibaraki (Japan); et al.], Cheoun, M K [Department of Physics and Origin of Matter and Evolution of Galaxies (OMEG Institute), Soongsil University , 369 Sangdo-ro, Dongjak-gu, Seoul 06978 ,], Choi, J H [Laboratory for High Energy Physics, Dongshin University , 67, Dongshindae-gil, Naju-si, Jeollanam-do, 58245 ,], Choi, J Y [Department of Fire Safety, Seoyeong University , 1 Seogang-ro, Buk-gu, Gwangju 61268 ,], Goh, J [Department of Physics, Kyung Hee University , 26, Kyungheedae-ro, Dongdaemun-gu, Seoul 02447 ,], Haga, K [J-PARC Center, Japan Atomic Energy Agency (JAEA) , 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195 ,], Harada, M [J-PARC Center, Japan Atomic Energy Agency (JAEA) , 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195 ,], Hasegawa, S [Advanced Science Research Center, Japan Atomic Energy Agency (JAEA) , 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195 ,; J-PARC Center, Japan Atomic Energy Agency (JAEA) , 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195 ,], Hwang, W [Department of Physics, Kyung Hee University , 26, Kyungheedae-ro, Dongdaemun-gu, Seoul 02447 ,], Iida, T [Faculty of Pure and Applied Sciences, University of Tsukuba , Tennodai 1-1-1, Tsukuba, Ibaraki 305-8571 ,], Jang, H I [Department of Fire Safety, Seoyeong University , 1 Seogang-ro, Buk-gu, Gwangju 61268 ,], Jang, J S [Department of Physics and Photon Science, Gwangju Institute of Science and Technology , 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005 ,], Joo, K K [Department of Physics, Chonnam National University , 77, Yongbong-ro, Buk-gu, Gwangju 61186 ,], Jung, D E [Department of Physics, Sungkyunkwan University , 2066, Seobu-ro, Jangan-gu, Suwon-si, Gyeonggi-do 16419 ,], Kang, S K [School of Liberal Arts, Seoul National University of Science and Technology , 232 Gongneung-ro, Nowon-gu, Seoul 139-743 ,], Kasugai, Y [J-PARC Center, Japan Atomic Energy Agency (JAEA) , 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195 ,], Kawasaki, T [Department of Physics, Kitasato University , 1 Chome-15-1 Kitazato, Minami Ward, Sagamihara, Kanagawa 252-0329 ,], Kim, E J [Division of Science Education, Jeonbuk National University , 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896 ,], Kim, J Y [Department of Physics, Chonnam National University , 77, Yongbong-ro, Buk-gu, Gwangju 61186 ,], Kim, S B [School of Physics, Sun Yat-sen (Zhongshan) University , Haizhu District, Guangzhou 510275 ,], Kim, W [Department of Physics, Kyungpook National University , 80 Daehak-ro, Buk-gu, Daegu 41566 ,], Kinoshita, H [J-PARC Center, Japan Atomic Energy Agency (JAEA) , 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195 ,], Konno, T [Department of Physics, Kitasato University , 1 Chome-15-1 Kitazato, Minami Ward, Sagamihara, Kanagawa 252-0329 ,], Lee, D H [Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK) , 1-1 Oho, Tsukuba, Ibaraki 305-0801 ,], Lim, I T [Department of Physics, Chonnam National University , 77, Yongbong-ro, Buk-gu, Gwangju 61186 ,], Little, C [Physics Department, University of Michigan , 500 S. State Street, Ann Arbor, MI 48109 ,], Marzec, E [Physics Department, University of Michigan , 500 S. State Street, Ann Arbor, MI 48109 ,], Maruyama, T [Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK) , 1-1 Oho, Tsukuba, Ibaraki 305-0801 ,], Masuda, S [J-PARC Center, Japan Atomic Energy Agency (JAEA) , 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195 ,], Meigo, S [J-PARC Center, Japan Atomic Energy Agency (JAEA) , 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195 ,], Moon, D H [Department of Physics, Chonnam National University , 77, Yongbong-ro, Buk-gu, Gwangju 61186 ,], Nakano, T [Research Center for Nuclear Physics, Osaka University , 10-1 Mihogaoka, Ibaraki, Osaka 567-0047 ,], Niiyama, M [Department of Physics, Kyoto Sangyo University , Motoyama, Kamigamo, Kita-Ku, Kyoto-City 603-8555 ,], Nishikawa, K [Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK) , 1-1 Oho, Tsukuba, Ibaraki 305-0801 ,], Pac, M Y [Laboratory for High Energy Physics, Dongshin University , 67, Dongshindae-gil, Naju-si, Jeollanam-do, 58245 ,], Park, H W [Department of Physics, Chonnam National University , 77, Yongbong-ro, Buk-gu, Gwangju 61186 ,], Park, J S [Department of Physics, Kyungpook National University , 80 Daehak-ro, Buk-gu, Daegu 41566 ,], Park, R G [Department of Physics, Chonnam National University , 77, Yongbong-ro, Buk-gu, Gwangju 61186 ,], Peeters, S J M [Department of Physics and Astronomy, University of Sussex , Sussex House, Falmer, Brighton BN1 9RH ,], Rott, C [Department of Physics and Astronomy, University of Utah , 201 Presidents’ Cir, Salt Lake City, UT 84112 ,], Sakai, K [J-PARC Center, Japan Atomic Energy Agency (JAEA) , 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195 ,], Sakamoto, S [J-PARC Center, Japan Atomic Energy Agency (JAEA) , 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195 ,], Shima, T [Research Center for Nuclear Physics, Osaka University , 10-1 Mihogaoka, Ibaraki, Osaka 567-0047 ,], Shin, C D [Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK) , 1-1 Oho, Tsukuba, Ibaraki 305-0801 ,], Spitz, J [Physics Department, University of Michigan , 500 S. State Street, Ann Arbor, MI 48109 ,], Suekane, F [Research Center for Neutrino Science, Tohoku University , 6-3 Azaaoba, Aramaki, Aoba-ku, Sendai 980-8578 ,], Sugaya, Y [Research Center for Nuclear Physics, Osaka University , 10-1 Mihogaoka, Ibaraki, Osaka 567-0047 ,], Suzuya, K [J-PARC Center, Japan Atomic Energy Agency (JAEA) , 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195 ,], Takeuchi, Y [Faculty of Pure and Applied Sciences, University of Tsukuba , Tennodai 1-1-1, Tsukuba, Ibaraki 305-8571 ,], Yamaguchi, Y [J-PARC Center, Japan Atomic Energy Agency (JAEA) , 2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195 ,], Yeh, M [Neutrino and Nuclear Chemistry, Brookhaven National Laboratory , Upton, NY 11973-5000 ,], Yeo, I S [Laboratory for High Energy Physics, Dongshin University , 67, Dongshindae-gil, Naju-si, Jeollanam-do, 58245 ,], Yoo, C [Department of Physics, Kyung Hee University , 26, Kyungheedae-ro, Dongdaemun-gu, Seoul 02447 ,], Yu, I [Department of Physics, Sungkyunkwan University , 2066, Seobu-ro, Jangan-gu, Suwon-si, Gyeonggi-do 16419 ,]. 2025-01-28. Pulse Shape Discrimination in JSNS 2. https://doi.org/10.1093/ptep%2Fptaf016

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