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Neutron-Multiplicity Measurement in Muon Capture on Oxygen Nuclei in the Gadolinium-Loaded Super-Kamiokande Detector.

Publication ,  Journal Article
Miki, S; Abe, K; Abe, S; Asaoka, Y; Bronner, C; Harada, M; Hayato, Y; Hiraide, K; Hosokawa, K; Ieki, K; Ikeda, M; Kameda, J; Kanemura, Y ...
Published in: Physical review letters
April 2026

In recent neutrino detectors, neutrons produced in neutrino reactions play an important role. Muon capture on oxygen nuclei is one of the processes that produce neutrons in water Cherenkov detectors. We measured neutron multiplicity in the process using cosmic ray muons that stop in the gadolinium-loaded Super-Kamiokande detector. For this measurement, neutron detection efficiency is obtained with the muon capture events followed by gamma rays to be 50.2_{-2.1}^{+2.0}%. By fitting the observed multiplicity considering the detection efficiency, we measure neutron multiplicity in muon capture as P(0)=24±3%, P(1)=70_{-2}^{+3}%, P(2)=6.1±0.5%, P(3)=0.38±0.09%. This is the first measurement of the multiplicity of neutrons associated with muon capture on oxygen without neutron energy threshold.

Duke Scholars

Published In

Physical review letters

DOI

EISSN

1079-7114

ISSN

0031-9007

Publication Date

April 2026

Volume

136

Issue

13

Start / End Page

131801

Related Subject Headings

  • General Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
 

Citation

APA
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ICMJE
MLA
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Miki, S., Abe, K., Abe, S., Asaoka, Y., Bronner, C., Harada, M., … Super-Kamiokande Collaboration. (2026). Neutron-Multiplicity Measurement in Muon Capture on Oxygen Nuclei in the Gadolinium-Loaded Super-Kamiokande Detector. Physical Review Letters, 136(13), 131801. https://doi.org/10.1103/pmyx-jn3s
Miki, S., K. Abe, S. Abe, Y. Asaoka, C. Bronner, M. Harada, Y. Hayato, et al. “Neutron-Multiplicity Measurement in Muon Capture on Oxygen Nuclei in the Gadolinium-Loaded Super-Kamiokande Detector.Physical Review Letters 136, no. 13 (April 2026): 131801. https://doi.org/10.1103/pmyx-jn3s.
Miki S, Abe K, Abe S, Asaoka Y, Bronner C, Harada M, et al. Neutron-Multiplicity Measurement in Muon Capture on Oxygen Nuclei in the Gadolinium-Loaded Super-Kamiokande Detector. Physical review letters. 2026 Apr;136(13):131801.
Miki, S., et al. “Neutron-Multiplicity Measurement in Muon Capture on Oxygen Nuclei in the Gadolinium-Loaded Super-Kamiokande Detector.Physical Review Letters, vol. 136, no. 13, Apr. 2026, p. 131801. Epmc, doi:10.1103/pmyx-jn3s.
Miki S, Abe K, Abe S, Asaoka Y, Bronner C, Harada M, Hayato Y, Hiraide K, Hosokawa K, Ieki K, Ikeda M, Kameda J, Kanemura Y, Kaneshima R, Kashiwagi Y, Kataoka Y, Mine S, Miura M, Moriyama S, Nakahata M, Nakayama S, Noguchi Y, Okamoto K, Pronost G, Sato K, Sekiya H, Shiba H, Shimizu K, Shiozawa M, Sonoda Y, Suzuki Y, Takeda A, Takemoto Y, Takenaka A, Tanaka H, Watanabe S, Yano T, Kajita T, Okumura K, Tashiro T, Tomiya T, Wang X, Yoshida S, Megias GD, Fernandez P, Labarga L, Ospina N, Zaldivar B, Pointon BW, Yanagisawa C, Kearns E, Raaf JL, Wan L, Wester T, Bian J, Cortez B, Griskevich NJ, Locke S, Smy MB, Sobel HW, Takhistov V, Yankelevich A, Hill J, Jang MC, Lee SH, Moon DH, Park RG, Yang BS, Bodur B, Scholberg K, Walter CW, Beauchêne A, Drapier O, Ershova A, Giampaolo A, Mueller TA, Santos AD, Paganini P, Quach C, Quilain B, Rogly R, Nakamura T, Jang JS, Litchfield RP, Machado LN, Soler FJP, Learned JG, Choi K, Iovine N, Cao S, Anthony LHV, Martin D, Prouse NW, Scott M, Sztuc AA, Uchida Y, Berardi V, Calabria NF, Catanesi MG, Radicioni E, Langella A, De Rosa G, Collazuol G, Feltre M, Iacob F, Lamoureux M, Mattiazzi M, Ludovici L, Gonin M, Périssé L, Fujisawa C, Horiuchi S, Kobayashi M, Liu YM, Maekawa Y, Nishimura Y, Okazaki R, Akutsu R, Friend M, Hasegawa T, Ishida T, Kobayashi T, Jakkapu M, Matsubara T, Nakadaira T, Nakamura K, Oyama Y, Portocarrero Yrey A, Sakashita K, Sekiguchi T, Tsukamoto T, Bhuiyan N, Burton GT, Di Lodovico F, Gao J, Goldsack A, Katori T, Migenda J, Ramsden RM, Xie Z, Zsoldos S, Kotsar Y, Ozaki H, Suzuki AT, Takagi Y, Takeuchi Y, Zhong H, Feng J, Feng L, Han S, Hu JR, Hu Z, Kawaue M, Kikawa T, Mori M, Nakaya T, Ngoc TV, Wendell RA, Yasutome K, Jenkins SJ, McCauley N, Mehta P, Tarrant A, Wilking MJ, Fukuda Y, Itow Y, Menjo H, Ninomiya K, Yoshioka Y, Lagoda J, Mandal M, Mijakowski P, Prabhu YS, Zalipska J, Jia M, Jiang J, Jung CK, Shi W, Hino Y, Ishino H, Kitagawa H, Koshio Y, Nakanishi F, Sakai S, Tada T, Tano T, Ishizuka T, Barr G, Barrow D, Cook L, Samani S, Wark D, Holin A, Nova F, Jung S, Yang JY, Yoo J, Fannon JEP, Kneale L, Malek M, McElwee JM, Peacock T, Stowell P, Thiesse MD, Thompson LF, Wilson ST, Okazawa H, Lakshmi SM, Kim SB, Kwon E, Lee MW, Seo JW, Yu I, Ichikawa AK, Nakamura KD, Tairafune S, Nishijima K, Eguchi A, Goto S, Mizuno Y, Muro T, Nakagiri K, Nakajima Y, Shima S, Taniuchi N, Watanabe E, Yokoyama M, de Perio P, Fujita S, Jesús-Valls C, Martens K, Marti L, Tsui KM, Vagins MR, Xia J, Kuze M, Izumiyama S, Matsumoto R, Terada K, Asaka R, Ishitsuka M, Ito H, Kinoshita T, Ommura Y, Shigeta N, Shinoki M, Suganuma T, Yamauchi K, Yoshida T, Martin JF, Tanaka HA, Towstego T, Nakano Y, Cormier F, Gaur R, Gousy-Leblanc V, Hartz M, Konaka A, Li X, Smithers BR, Chen S, Wu Y, Xu BD, Zhang AQ, Zhang B, Girgus M, Govindaraj P, Posiadala-Zezula M, Boyd SB, Edwards R, Hadley D, Nicholson M, O’Flaherty M, Richards B, Ali A, Jamieson B, Amanai S, Minamino A, Pintaudi G, Sano S, Shibayama R, Shimamura R, Suzuki S, Wada K, Super-Kamiokande Collaboration. Neutron-Multiplicity Measurement in Muon Capture on Oxygen Nuclei in the Gadolinium-Loaded Super-Kamiokande Detector. Physical review letters. 2026 Apr;136(13):131801.

Published In

Physical review letters

DOI

EISSN

1079-7114

ISSN

0031-9007

Publication Date

April 2026

Volume

136

Issue

13

Start / End Page

131801

Related Subject Headings

  • General Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering