Updated on 2025/03/18

写真a

 
KOSHIO Yusuke
 
Organization
Faculty of Environmental, Life, Natural Science and Technology Associate Professor
Position
Associate Professor
External link

Degree

  • 博士(理学) ( 東京大学 )

Research Interests

  • neutrino

  • particle physics experiment

  • cosmic ray physics

  • supernova

Research Areas

  • Natural Science / Experimental studies related to particle-, nuclear-, cosmic ray and astro-physics  / neutrino physics

Education

  • The University of Tokyo   大学院理学系研究科   博士課程物理学専攻

    - 1997.3

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  • The University of Tokyo   大学院理学系研究科   修士課程物理学専攻

    - 1994.3

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  • Kyoto University   工学部   電子工学科

    - 1992.3

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Research History

  • The University of Tokyo   カブリ数物連携宇宙機構

    2013.4

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  • Okayama University   自然科学研究科   Associate Professor

    2013.4

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  • ミラノ大学   客員科学研究員(兼任)

    2011.1 - 2011.8

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  • グランサッソ国立研究所   客員科学研究員(兼任)

    2009.7 - 2011.8

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  • The University of Tokyo   カブリ数物連携宇宙機構

    2008.12 - 2013.3

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Professional Memberships

Committee Memberships

  • 日本学術振興会   科研費審査員  

    2022.10 - 2022.11   

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  • 日本学術振興会   科研費審査員  

    2021.11   

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  • SNOWMASS   Topical convener NF04  

    2020.3 - 2022.12   

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  • 大阪大学核物理研究センター   研究計画検討専門委員会委員  

    2018.4 - 2020.3   

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    Committee type:Academic society

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  • 日本物理学会   宇宙線・宇宙物理領域運営委員  

    2015.10 - 2016.9   

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    Committee type:Academic society

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Papers

  • Observing Supernova Neutrino Light Curves with Super-Kamiokande. V. Distance Estimation with Neutrinos Reviewed

    Yudai Suwa, Akira Harada, Masamitsu Mori, Ken’ichiro Nakazato, Ryuichiro Akaho, Masayuki Harada, Yusuke Koshio, Fumi Nakanishi, Kohsuke Sumiyoshi, Roger A. Wendell

    The Astrophysical Journal   980 ( 117 )   1 - 5   2025.2

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.3847/1538-4357/adabe2

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  • First Joint Oscillation Analysis of Super-Kamiokande Atmospheric and T2K Accelerator Neutrino Data. International journal

    K Abe, S Abe, C Bronner, Y Hayato, K Hiraide, K Hosokawa, K Ieki, M Ikeda, J Kameda, Y Kanemura, R Kaneshima, Y Kashiwagi, Y Kataoka, S Miki, S Mine, M Miura, S Moriyama, M Nakahata, Y Nakano, S Nakayama, Y Noguchi, K Sato, H Sekiya, H Shiba, K Shimizu, M Shiozawa, Y Sonoda, Y Suzuki, A Takeda, Y Takemoto, H Tanaka, T Yano, S Han, T Kajita, K Okumura, T Tashiro, T Tomiya, X Wang, S Yoshida, P Fernandez, L Labarga, N Ospina, B Zaldivar, B W Pointon, E Kearns, J Mirabito, J L Raaf, L Wan, T Wester, J Bian, N J Griskevich, M B Smy, H W Sobel, V Takhistov, A Yankelevich, J Hill, M C Jang, S H Lee, D H Moon, R G Park, B Bodur, K Scholberg, C W Walter, A Beauchêne, O Drapier, A Giampaolo, Th A Mueller, A D Santos, P Paganini, B Quilain, R Rogly, T Nakamura, J S Jang, L N Machado, J G Learned, K Choi, N Iovine, S Cao, L H V Anthony, D Martin, N W Prouse, M Scott, Y Uchida, V Berardi, N F Calabria, M G Catanesi, E Radicioni, A Langella, G De Rosa, G Collazuol, M Feltre, F Iacob, M Mattiazzi, L Ludovici, M Gonin, L Périssé, G Pronost, C Fujisawa, S Horiuchi, M Kobayashi, Y M Liu, Y Maekawa, Y Nishimura, R Okazaki, R Akutsu, M Friend, T Hasegawa, T Ishida, T Kobayashi, M Jakkapu, T Matsubara, T Nakadaira, K Nakamura, Y Oyama, A Portocarrero Yrey, K Sakashita, T Sekiguchi, T Tsukamoto, N Bhuiyan, G T Burton, F Di Lodovico, J Gao, A Goldsack, T Katori, J Migenda, R M Ramsden, Z Xie, S Zsoldos, A T Suzuki, Y Takagi, Y Takeuchi, H Zhong, J Feng, L Feng, J R Hu, Z Hu, M Kawaue, T Kikawa, M Mori, T Nakaya, R A Wendell, K Yasutome, S J Jenkins, N McCauley, P Mehta, A Tarrant, M J Wilking, Y Fukuda, Y Itow, H Menjo, K Ninomiya, Y Yoshioka, J Lagoda, M Mandal, P Mijakowski, Y S Prabhu, J Zalipska, M Jia, J Jiang, W Shi, C Yanagisawa, M Harada, Y Hino, H Ishino, Y Koshio, F Nakanishi, S Sakai, T Tada, T Tano, T Ishizuka, G Barr, D Barrow, L Cook, S Samani, D Wark, A Holin, F Nova, S Jung, B S Yang, J Y Yang, J Yoo, J E P Fannon, L Kneale, M Malek, J M McElwee, M D Thiesse, L F Thompson, S T Wilson, H Okazawa, S M Lakshmi, S B Kim, E Kwon, J W Seo, I Yu, A K Ichikawa, K D Nakamura, S Tairafune, K Nishijima, A Eguchi, K Nakagiri, Y Nakajima, S Shima, N Taniuchi, E Watanabe, M Yokoyama, P de Perio, S Fujita, C Jesús-Valls, K Martens, K M Tsui, M R Vagins, J Xia, S Izumiyama, M Kuze, R Matsumoto, K Terada, R Asaka, M Ishitsuka, H Ito, Y Ommura, N Shigeta, M Shinoki, K Yamauchi, T Yoshida, R Gaur, V Gousy-Leblanc, M Hartz, A Konaka, X Li, S Chen, B D Xu, Y Wu, A Q Zhang, B Zhang, M Posiadala-Zezula, S B Boyd, R Edwards, D Hadley, M Nicholson, M O'Flaherty, B Richards, A Ali, B Jamieson, S Amanai, Ll Marti, A Minamino, R Shibayama, R Shimamura, S Suzuki, K Abe, S Abe, N Akhlaq, R Akutsu, H Alarakia-Charles, A Ali, Y I Alj Hakim, S Alonso Monsalve, C Andreopoulos, L Anthony, M Antonova, S Aoki, K A Apte, T Arai, T Arihara, S Arimoto, Y Asada, Y Ashida, E T Atkin, N Babu, M Barbi, G J Barker, G Barr, D Barrow, P Bates, M Batkiewicz-Kwasniak, V Berardi, L Berns, S Bhadra, A Blanchet, A Blondel, S Bolognesi, S Bordoni, S B Boyd, A Bravar, C Bronner, A Bubak, M Buizza Avanzini, J A Caballero, N F Calabria, S Cao, D Carabadjac, A J Carter, S L Cartwright, M P Casado, M G Catanesi, A Cervera, J Chakrani, A Chalumeau, D Cherdack, P S Chong, A Chvirova, M Cicerchia, J Coleman, G Collazuol, L Cook, F Cormier, A Cudd, D D'ago, C Dalmazzone, T Daret, P Dasgupta, C Davis, Yu I Davydov, A De Roeck, G De Rosa, T Dealtry, C C Delogu, C Densham, A Dergacheva, R Dharmapal, F Di Lodovico, G Diaz Lopez, S Dolan, D Douqa, T A Doyle, O Drapier, K E Duffy, J Dumarchez, P Dunne, K Dygnarowicz, A Eguchi, J Elias, S Emery-Schrenk, G Erofeev, A Ershova, G Eurin, D Fedorova, S Fedotov, M Feltre, L Feng, D Ferlewicz, A J Finch, G A Fiorentini Aguirre, G Fiorillo, M D Fitton, J M Franco Patiño, M Friend, Y Fujii, Y Fukuda, Y Furui, L Giannessi, C Giganti, V Glagolev, M Gonin, J González Rosa, E A G Goodman, A Gorin, K Gorshanov, M Grassi, M Guigue, D R Hadley, J T Haigh, S Han, D A Harris, M Hartz, T Hasegawa, S Hassani, N C Hastings, Y Hayato, I Heitkamp, D Henaff, Y Hino, M Hogan, J Holeczek, A Holin, T Holvey, N T Hong Van, T Honjo, K Hosokawa, J Hu, A K Ichikawa, K Ieki, M Ikeda, T Ishida, M Ishitsuka, A Izmaylov, M Jakkapu, B Jamieson, S J Jenkins, C Jesús-Valls, M Jia, J J Jiang, J Y Ji, P Jonsson, S Joshi, C K Jung, M Kabirnezhad, A C Kaboth, T Kajita, H Kakuno, J Kameda, S Karpova, S P Kasetti, V S Kasturi, Y Kataoka, T Katori, Y Kawamura, M Kawaue, E Kearns, M Khabibullin, A Khotjantsev, T Kikawa, S King, V Kiseeva, J Kisiel, L Kneale, H Kobayashi, T Kobayashi, L Koch, S Kodama, M Kolupanova, A Konaka, L L Kormos, Y Koshio, T Koto, K Kowalik, Y Kudenko, Y Kudo, S Kuribayashi, R Kurjata, V Kurochka, T Kutter, M Kuze, M La Commara, L Labarga, M Lachat, K Lachner, J Lagoda, S M Lakshmi, M Lamers James, A Langella, J-F Laporte, D Last, N Latham, M Laveder, L Lavitola, M Lawe, Y Lee, D Leon Silverio, S Levorato, S Lewis, C Lin, R P Litchfield, S L Liu, W Li, A Longhin, K R Long, A Lopez Moreno, L Ludovici, X Lu, T Lux, L N Machado, L Magaletti, K Mahn, K K Mahtani, M Malek, M Mandal, S Manly, A D Marino, L Marti-Magro, D G R Martin, M Martini, J F Martin, T Maruyama, T Matsubara, R Matsumoto, V Matveev, C Mauger, K Mavrokoridis, E Mazzucato, N McCauley, K S McFarland, C McGrew, J McKean, A Mefodiev, G D Megias, P Mehta, L Mellet, C Metelko, M Mezzetto, S Miki, E Miller, A Minamino, O Mineev, S Mine, J Mirabito, M Miura, L Molina Bueno, S Moriyama, S Moriyama, P Morrison, Th A Mueller, D Munford, A Muñoz, L Munteanu, K Nagai, Y Nagai, T Nakadaira, K Nakagiri, M Nakahata, Y Nakajima, A Nakamura, K Nakamura, K D Nakamura, Y Nakano, S Nakayama, T Nakaya, K Nakayoshi, C E R Naseby, T V Ngoc, D T Nguyen, V Q Nguyen, K Niewczas, S Nishimori, Y Nishimura, Y Noguchi, T Nosek, F Nova, P Novella, J C Nugent, H M O'Keeffe, L O'Sullivan, T Odagawa, R Okazaki, W Okinaga, K Okumura, T Okusawa, N Onda, N Ospina, L Osu, Y Oyama, V Palladino, V Paolone, M Pari, J Parlone, J Pasternak, D Payne, G C Penn, D Pershey, M Pfaff, L Pickering, G Pintaudi, C Pistillo, B Popov, A J Portocarrero Yrey, K Porwit, M Posiadala-Zezula, Y S Prabhu, H Prasad, F Pupilli, B Quilain, P T Quyen, T Radermacher, E Radicioni, B Radics, M A Ramirez, P N Ratoff, M Reh, C Riccio, E Rondio, S Roth, N Roy, A Rubbia, L Russo, A Rychter, W Saenz, K Sakashita, F Sánchez, Y Sato, T Schefke, C M Schloesser, K Scholberg, M Scott, Y Seiya, T Sekiguchi, H Sekiya, D Sgalaberna, A Shaikhiev, M Shiozawa, Y Shiraishi, A Shvartsman, N Skrobova, K Skwarczynski, D Smyczek, M Smy, J T Sobczyk, H Sobel, F J P Soler, A J Speers, R Spina, Y Stroke, I A Suslov, S Suvorov, A Suzuki, S Y Suzuki, Y Suzuki, M Tada, S Tairafune, A Takeda, Y Takeuchi, K Takifuji, H K Tanaka, H Tanigawa, A Teklu, V V Tereshchenko, N Thamm, L F Thompson, W Toki, C Touramanis, T Tsukamoto, M Tzanov, Y Uchida, M Vagins, D Vargas, M Varghese, G Vasseur, E Villa, W G S Vinning, U Virginet, T Vladisavljevic, T Wachala, D Wakabayashi, H T Wallace, J G Walsh, Y Wang, L Wan, D Wark, M O Wascko, A Weber, R Wendell, M J Wilking, C Wilkinson, J R Wilson, K Wood, C Wret, J Xia, Y-H Xu, K Yamamoto, T Yamamoto, C Yanagisawa, G Yang, T Yano, K Yasutome, N Yershov, U Yevarouskaya, M Yokoyama, Y Yoshimoto, N Yoshimura, M Yu, R Zaki, A Zalewska, J Zalipska, K Zaremba, G Zarnecki, J Zhang, X Y Zhao, H Zhong, T Zhu, M Ziembicki, E D Zimmerman, M Zito, S Zsoldos

    Physical review letters   134 ( 1 )   011801 - 011801   2025.1

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    Language:English   Publishing type:Research paper (scientific journal)  

    The Super-Kamiokande and T2K Collaborations present a joint measurement of neutrino oscillation parameters from their atmospheric and beam neutrino data. It uses a common interaction model for events overlapping in neutrino energy and correlated detector systematic uncertainties between the two datasets, which are found to be compatible. Using 3244.4 days of atmospheric data and a beam exposure of 19.7(16.3)×10^{20} protons on target in (anti)neutrino mode, the analysis finds a 1.9σ exclusion of CP conservation (defined as J_{CP}=0) and a 1.2σ exclusion of the inverted mass ordering.

    DOI: 10.1103/PhysRevLett.134.011801

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  • Modification on Thermal Motion in Geant4 for Neutron Capture Simulation in Gadolinium Loaded Water Reviewed

    Y Hino, K Abe, R Asaka, S Han, M Harada, M Ishitsuka, H Ito, S Izumiyama, Y Kanemura, Y Koshio, F Nakanishi, H Sekiya, T Yano

    Progress of Theoretical and Experimental Physics   2025 ( 1 )   013C01   2024.12

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Oxford University Press (OUP)  

    Abstract

    Neutron tagging is a fundamental technique for electron anti-neutrino detection via the inverse beta decay channel. A reported discrepancy in neutron detection efficiency between observational data and simulation predictions prompted an investigation into neutron capture modeling in Geant4. The study revealed that an overestimation of the thermal motion of hydrogen atoms in Geant4 impacts the fraction of captured nuclei. By manually modifying the Geant4 implementation, the simulation results align with calculations based on evaluated nuclear data and show good agreement with observables derived from the SK-Gd data.

    DOI: 10.1093/ptep/ptae193

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    Other Link: https://academic.oup.com/ptep/article-pdf/2025/1/013C01/61281853/ptae193.pdf

  • Search for proton decay via 𝑝 →𝑒+⁢𝜂 and 𝑝 →𝜇+⁢𝜂 with a 0.37 Mton-year exposure of Super-Kamiokande Reviewed

    N. Taniuchi, K. Abe, S. Abe, Y. Asaoka, C. Bronner, M. Harada, Y. Hayato, K. Hiraide, K. Hosokawa, K. Ieki, M. Ikeda, J. Kameda, Y. Kanemura, R. Kaneshima, Y. Kashiwagi, Y. Kataoka, S. Miki, S. Mine, M. Miura, S. Moriyama, M. Nakahata, S. Nakayama, Y. Noguchi, G. Pronost, K. Okamoto, K. Sato, H. Sekiya, H. Shiba, K. Shimizu, M. Shiozawa, Y. Sonoda, Y. Suzuki, A. Takeda, Y. Takemoto, A. Takenaka, H. Tanaka, S. Watanabe, T. Yano, T. Kajita, K. Okumura, T. Tashiro, T. Tomiya, X. Wang, S. Yoshida, G. D. Megias, P. Fernandez, L. Labarga, N. Ospina, B. Zaldivar, B. W. Pointon, E. Kearns, J. Mirabito, J. L. Raaf, L. Wan, T. Wester, J. Bian, N. J. Griskevich, W. R. Kropp, S. Locke, M. B. Smy, H. W. Sobel, V. Takhistov, A. Yankelevich, J. Hill, M. C. Jang, J. Y. Kim, S. H. Lee, I. T. Lim, D. H. Moon, R. G. Park, B. S. Yang, B. Bodur, K. Scholberg, C. W. Walter, A. Beauchêne, L. Bernard, A. Coffani, O. Drapier, S. El Hedri, A. Giampaolo, Th. A. Mueller, A. D. Santos, P. Paganini, R. Rogly, T. Nakamura, J. S. Jang, L. N. Machado, J. G. Learned, K. Choi, N. Iovine, S. Cao, L. H. V. Anthony, D. Martin, N. W. Prouse, M. Scott, A. A. Sztuc, Y. Uchida, V. Berardi, N. F. Calabria, M. G. Catanesi, E. Radicioni, A. Langella, G. De Rosa, G. Collazuol, M. Feltre, F. Iacob, M. Lamoureux, M. Mattiazzi, L. Ludovici, M. Gonin, L. Périssé, B. Quilain, C. Fujisawa, S. Horiuchi, M. Kobayashi, Y. M. Liu, Y. Maekawa, Y. Nishimura, R. Okazaki, R. Akutsu, M. Friend, T. Hasegawa, T. Ishida, T. Kobayashi, M. Jakkapu, T. Matsubara, T. Nakadaira, K. Nakamura, Y. Oyama, A. Portocarrero Yrey, K. Sakashita, T. Sekiguchi, T. Tsukamoto, N. Bhuiyan, T. Boschi, G. T. Burton, F. Di Lodovico, J. Gao, A. Goldsack, T. Katori, J. Migenda, R. M. Ramsden, M. Taani, Z. Xie, S. Zsoldos, Y. Kotsar, H. Ozaki, A. T. Suzuki, Y. Takagi, Y. Takeuchi, S. Yamamoto, H. Zhong, J. Feng, L. Feng, S. Han, J. R. Hu, Z. Hu, M. Kawaue, T. Kikawa, M. Mori, T. Nakaya, R. A. Wendell, K. Yasutome, S. J. Jenkins, N. McCauley, P. Mehta, A. Tarrant, M. J. Wilking, Y. Fukuda, Y. Itow, H. Menjo, K. Ninomiya, Y. Yoshioka, J. Lagoda, M. Mandal, P. Mijakowski, Y. S. Prabhu, J. Zalipska, M. Jia, J. Jiang, C. K. Jung, W. Shi, C. Yanagisawa, Y. Hino, H. Ishino, S. Ito, H. Kitagawa, Y. Koshio, W. Ma, F. Nakanishi, S. Sakai, T. Tada, T. Tano, T. Ishizuka, G. Barr, D. Barrow, L. Cook, S. Samani, D. Wark, A. Holin, F. Nova, S. Jung, J. Y. Yang, J. Yoo, J. E. P. Fannon, L. Kneale, M. Malek, J. M. McElwee, O. Stone, P. Stowell, M. D. Thiesse, L. F. Thompson, S. T. Wilson, H. Okazawa, S. M. Lakshmi, S. B. Kim, E. Kwon, M. W. Lee, J. W. Seo, I. Yu, A. K. Ichikawa, K. D. Nakamura, S. Tairafune, K. Nishijima, M. Koshiba, A. Eguchi, S. Goto, K. Iwamoto, Y. Mizuno, T. Muro, K. Nakagiri, Y. Nakajima, S. Shima, E. Watanabe, M. Yokoyama, P. de Perio, S. Fujita, C. Jesús-Valls, K. Martens, Ll. Marti, K. M. Tsui, M. R. Vagins, J. Xia, S. Izumiyama, M. Kuze, R. Matsumoto, K. Terada, R. Asaka, M. Inomoto, M. Ishitsuka, H. Ito, T. Kinoshita, Y. Ommura, N. Shigeta, M. Shinoki, T. Suganuma, K. Yamauchi, T. Yoshida, Y. Nakano, J. F. Martin, H. A. Tanaka, T. Towstego, R. Gaur, V. Gousy-Leblanc, M. Hartz, A. Konaka, X. Li, S. Chen, Y. Wu, B. D. Xu, A. Q. Zhang, B. Zhang, M. Posiadala-Zezula, S. B. Boyd, R. Edwards, D. Hadley, M. Nicholson, M. O’Flaherty, B. Richards, A. Ali, B. Jamieson, S. Amanai, A. Minamino, G. Pintaudi, S. Sano, R. Sasaki, R. Shibayama, R. Shimamura, S. Suzuki, K. Wada

    Physical Review D   110 ( 11 )   112011-1 - 102011-13   2024.12

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Physical Society (APS)  

    A search for proton decay into e+/μ+ and a η meson has been performed using data from a 0.373  Mton·year exposure (6050.3 live days) of Super-Kamiokande. Compared to previous searches this work introduces an improved model of the intranuclear η interaction cross section, resulting in a factor of 2 reduction in uncertainties from this source and ∼10% increase in signal efficiency. No significant data excess was found above the expected number of atmospheric neutrino background events resulting in no indication of proton decay into either mode. Lower limits on the proton partial lifetime of 1.4×1034  years for p→e+η and 7.3×1033  years for p→μ+η at the 90% CL were set. These limits are around 1.5 times longer than our previous study and are the most stringent to date.

    Published by the American Physical Society 2024

    DOI: 10.1103/physrevd.110.112011

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    Other Link: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.110.112011/fulltext

  • Measurement of γ-Rays Generated by Neutron Interaction with 16O at 30 MeV and 250 MeV Reviewed

    T Tano, T Horai, Y Ashida, Y Hino, F Iacob, A Maurel, M Mori, G Collazuol, A Konaka, Y Koshio, T Nakaya, T Shima, R Wendell

    Progress of Theoretical and Experimental Physics   2024 ( 11 )   113D01   2024.10

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Oxford University Press (OUP)  

    Abstract

    Deep understanding of $\gamma$-ray production from the fast neutron reaction in water is crucial for various physics studies at large-scale water Cherenkov detectors. We performed test experiments using quasi-mono energetic neutron beams ($E_n = 30$ and 250 MeV) at Osaka University’s Research Center for Nuclear Physics to measure $\gamma$-rays originating from the neutron–oxygen reaction with a high-purity germanium detector. Multiple $\gamma$-ray peaks which are expected to be from excited nuclei after the neutron–oxygen reaction were successfully observed. We measured the neutron beam flux using an organic liquid scintillator for the cross section measurement. With a spectral fitting analysis based on the tailored $\gamma$-ray signal and background templates, we measured cross sections for each observed $\gamma$-ray component. The results will be useful to validate neutron models employed in ongoing and future water Cherenkov experiments.

    DOI: 10.1093/ptep/ptae159

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    Other Link: https://academic.oup.com/ptep/article-pdf/2024/11/113D01/60833777/ptae159.pdf

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MISC

  • Updates in neutron tagging algorithm and its validation in Super-Kamiokande

    HAN Seungho, 矢野孝臣, 原田将之, 小汐由介, 奥村公宏

    日本物理学会講演概要集(CD-ROM)   78 ( 1 )   2023

  • Evaluation of the neutron detection efficiency for the SK-Gd experiment using Am/Be source

    原田将之, 小汐由介, HAN Seungho, 渡辺柊平, 矢野孝臣, 奥村公宏, 関谷洋之, 森山茂栄, 中島康博, WENDELL Roger

    日本物理学会講演概要集(CD-ROM)   76 ( 2 )   2021

  • A study of neutron-related gamma-ray detection algorithm with MLP, for the SK-Gd experiment

    HAN S., 矢野孝臣, 原田将之, 小汐由介, 奥村公宏

    日本物理学会講演概要集(CD-ROM)   76 ( 1 )   2021

  • γ-rays from giant resonance of 16O

    須藤高志, REEN M. S., OU I., ALI A., DHIR R., 作田誠, 山田芳幸, 福田大輔, 白鬚哲也, 小汐由介, 森俊彰, 民井淳, 岩本ちひろ, 伊藤健, 三浦正季, 山本哲也, 青井考, 井出口栄治, 鈴木智和, 與曽井優, 川畑貴裕, 足立智, 古野達也, 津村美保, 村田求基, 秋宗秀俊, 矢野孝臣

    日本物理学会講演概要集(CD-ROM)   75 ( 2 )   2020

  • Measurement of γ Rays from the Giant Resonances in 12C and 16O Excited by the (p, p′) Reaction at 392 MeV

    REEN Mandeep Singh, REEN Mandeep Singh, SUDO Takashi, OU Iwa, SAKUDA Makoto, FUKUDA Daisuke, ALI Ajmi, KOSHIO Yusuke, YOSOI Masaru, TAMII Atsushi, AOI Nori, IDEGUCHI Eiji, SUZUKI Tomokazu, YAMAMOTO Tetsuya, IWAMOTO Chihiro, IWAMOTO Chihiro, KAWABATA Takahiro, ADACHI Shunsuke, TSUMURA Miho, MURATA Michika, FURUNO Tatsuya, AKIMUNE Hidetoshi, YANO Takatomi, SUZUKI Toshio, DHIR Rohit

    JPS Conference Proceedings (Web)   31   2020

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Presentations

  • Supernova neutrino detection in Super-Kamiokande Invited

    Yusuke Koshio

    INT workshop, 'New Directions in Neutrino Flavor Evolution in Astrophysical Systems'  2021.9.25 

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    Language:English   Presentation type:Oral presentation (invited, special)  

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  • 超新星背景ニュートリノ精密観測 Invited

    小汐由介

    日本物理学会  2021.9.17 

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    Language:Japanese   Presentation type:Symposium, workshop panel (nominated)  

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  • ニュートリノ振動実験の現状と将来の展望 Invited

    小汐由介

    岡山理科大学・セミナー  2020.12.16 

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    Language:Japanese   Presentation type:Public lecture, seminar, tutorial, course, or other speech  

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  • ニュートリノで探る宇宙の謎 Invited

    小汐由介

    倉敷南高校  2020.11.19 

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    Language:Japanese   Presentation type:Public lecture, seminar, tutorial, course, or other speech  

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  • 中性カレントニュートリノ検出計画 Invited

    小汐由介

    日本物理学会  2020.9.17 

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    Language:Japanese   Presentation type:Symposium, workshop panel (nominated)  

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Awards

  • 特別研究員等審査会専門委員表彰

    2017.8   日本学術振興会  

    小汐由介

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  • 理学部教育貢献賞

    2017.3   岡山大学  

    小汐由介

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  • 基礎物理学ブレークスルー賞

    2015.11  

    小汐由介

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  • 朝日賞

    1998.1   朝日新聞社   ニュートリノに質量があることの発見

    スーパーカミオカンデ観測グループ

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Research Projects

  • Towards the discovery of neutrino CP violation using the world's highest intensity beam and most precise neutrino interaction measurements

    Grant number:22H04943  2022.04 - 2027.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (S)

    坂下 健, 久世 正弘, 中桐 洸太, 松原 綱之, 市川 温子, 木河 達也, 小汐 由介

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    Grant amount:\190710000 ( Direct expense: \146700000 、 Indirect expense:\44010000 )

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  • Early identification of supernovae using neutrino observations at Super-Kamiokande

    Grant number:21H04989  2021.07 - 2026.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (S)

    中畑 雅行

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    Grant amount:\198900000 ( Direct expense: \153000000 、 Indirect expense:\45900000 )

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  • Search for Supernova Relic Neutrinos using a large water Cherenkov detector

    Grant number:20H00162  2020.04 - 2025.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)  Grant-in-Aid for Scientific Research (A)

    小汐 由介, 中島 康博

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    Grant amount:\44460000 ( Direct expense: \34200000 、 Indirect expense:\10260000 )

    大質量の恒星はその一生の最後に超新星爆発を起こす。その際、爆発の99%以上のエネルギーはニュートリノによって宇宙空間にばらまかれる。宇宙に最初の星ができて以来、超新星爆発は約1秒に1回の頻度で絶えず起きており、その都度ニュートリノが宇宙にまき散らされていると考えられている。このニュートリノは超新星背景ニュートリノ(SRN)と呼ばれ、世界中で探索が進められているが、未だ発見には至っていない。世界最大のニュートリノ検出器スーパーカミオカンデ(SK)でSRNを発見するのが本研究の目的である。
    2020年度の成果としてはしては、まず13トンの硫酸ガドリニウムをスーパーカミオカンデに導入したことである。ガドリニウムの導入により、SRN解析に対する背景事象を効果的に削減し、感度が劇的に向上する。導入は順調に行われ、約1ヶ月で完了した。導入後のデータから、期待通りの信号が確認でき、検出器も安定して稼働している。
    本研究ではSKのデータ解析に加え、加速器を用いた素粒子・原子核反応の精密測定で、SRN発見に最も重要な大気ニュートリノによる背景事象の理解を進める。大気ニュートリノ反応の中でも、ニュートリノと水中の酸素原子核との中性カレント準弾性散乱(NCQE)と呼ばれる反応がSRNによる反応と全く区別がつかないため、この反応を精密に理解することが鍵となる。そこでNCQE 反応を、素性のよくわかったニュートリノビームを同じSK検出器で捉えるT2K実験で測定する。2020年度末からはT2K実験のデータ取得にも成功した。
    さらにT2K実験における NCQE反応の精度を上げるために、ニュートリノビームの不定性を削減する NA61/SHINE実験と、酸素原子核を標的としたビーム実験を行う。前者では、我々が提案した実験が正式に採用され、2021年度に行うことが決定した。

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  • Studying supernova explosions via their neutrino emissions

    Grant number:17H06365  2017.06 - 2022.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)  Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    ヴァギンズ マーク, 松古 栄夫, 住吉 光介, 小汐 由介, 原田 了

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    Grant amount:\156650000 ( Direct expense: \120500000 、 Indirect expense:\36150000 )

    One of the primary sources of near-field gravitational waves [GW] are core collapse supernova [SN] explosion. SN neutrinos, famously observed from SN1987A, provide a unique and vital probe into the inner dynamics of these dramatic events. Released together with GW during the initial stellar collapse, neutrinos and GW are both certain to travel through any obscuring dust or gas and remain undiminished upon their arrival at Earth. Neutrinos also carry information regarding the end state of the star: for explosions within our galaxy, collapses into neutron stars or black holes, the eventual sources of far-field GW, can be differentiated via observations of neutrino emissions.
    During FY2018, we began upgrading the existing Super-Kamiokande [SK] detector to be an advanced-technology, gadolinium-loaded SN neutrino detector. This was the first time SK was drained and serviced since 2006.
    There were four main tasks: 1) fix a longstanding water leak in the SK tank; 2) clean up the interior of the detector; 3) replace failed photomultiplier tubes, and; 4) install additional piping for better circulation of Gd-loaded water.
    On the theory side, SN simulations by 6D Boltzmann equation were performed on the K-computer to clarify the effects of SN core rotation in neutrino emission and transport. Moreover, the properties of SN dynamics and neutrino bursts for different progenitors and sets of the equation of state were explored as an evaluation of uncertainty in neutrino signals. We developed numerical codes for supernovae suitable for use on GPU systems.

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  • Studying supernova explosions via their neutrino emission

    2017.04 - 2022.03

    新学術領域研究 

    Mark Vagins

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    Grant type:Competitive

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Class subject in charge

  • Space Astrophysics 2 (2024academic year) Second semester  - 水3~4

  • Space Astrophysics B (2024academic year) Second semester  - 水3~4

  • Modern Physics for General Education (Astrophysics) (2024academic year) Third semester  - 月1~2

  • High Energy Particle Physics (2024academic year) Prophase  - その他

  • Seminar in Particle Physics (2024academic year) Other  - その他

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Media Coverage

  • 望遠鏡せいめい 特別公開や講演 来月5日 浅口でフェスタ Newspaper, magazine

    山陽新聞  2022.10.30

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  • 小柴昌俊氏死去に関するコメント Newspaper, magazine

    山陽新聞  2020.11.14

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    Author:Other 

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  • 「反物質」性質違う可能性 Newspaper, magazine

    山陽新聞  2020.4.16

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