Details of the Researcher

PHOTO

Hideyoshi Ozaki
Section
Research Center for Neutrino Science
Job title
Specially Appointed Assistant Professor(Research)
Degree

  • 博士（理学）（東北大学）

  • 修士（理学）（東北大学）

e-Rad No.
10880007

Research History 2

  • 2023/04 - Present
    Tohoku University　Research Center for Neutrino Science

  • 2020/04 - 2023/03
    Tohoku University　Research Center for Neutrino Science

Education 2

  • Tohoku University　Graduate School of Science　Department of Physics

    2015/04 - 2020/03

  • Tohoku University　Faculty of Science　Department of Physics

    2011/04 - 2015/03

Professional Memberships 1

  • 日本物理学会

Research Interests 3

  • マヨラナニュートリノ

  • ニュートリノレス二重ベータ崩壊

  • ニュートリノ

Research Areas 1

  • Natural sciences / Particle, nuclear, cosmic-ray, and astrophysics - experiment / Neutrino

Papers 18

  1. Search for charged excited states of dark matter with KamLAND-Zen

    S. Abe, M. Eizuka, S. Futagi, A. Gando, Y. Gando, S. Goto, T. Hachiya, K. Hata, K. Hosokawa, K. Ichimura, S. Ieki, H. Ikeda, K. Inoue, K. Ishidoshiro, Y. Kamei, N. Kawada, Y. Kishimoto, M. Koga, M. Kurasawa, T. Mitsui, H. Miyake, D. Morita, T. Nakahata, R. Nakajima, K. Nakamura, R. Nakamura, R. Nakamura, J. Nakane, H. Ozaki, T. Sakai, I. Shimizu, J. Shirai, K. Shiraishi, R. Shoji, A. Suzuki, A. Takeuchi, K. Tamae, H. Watanabe, K. Watanabe, S. Obara, S. Yoshida, S. Umehara, K. Fushimi, K. Kotera, Y. Urano, A. Ichikawa, B.E. Berger, B.K. Fujikawa, J.G. Learned, J. Maricic, S.N. Axani, Z. Fu, J. Smolsky, L.A. Winslow, Y. Efremenko, H.J. Karwowski, D.M. Markoff, W. Tornow, S. Dell'Oro, T. O'Donnell, J.A. Detwiler, S. Enomoto, M.P. Decowski, K.M. Weerman, C. Grant, A. Li, H. Song

    Physics Letters B　855　138846-138846　2024/08

    Publisher: Elsevier BV

    DOI： 10.1016/j.physletb.2024.138846 　

    ISSN： 0370-2693

  2. Measurement of cosmic-ray muon spallation products in a xenon-loaded liquid scintillator with KamLAND

    S. Abe, S. Asami, M. Eizuka, S. Futagi, A. Gando, Y. Gando, T. Gima, A. Goto, T. Hachiya, K. Hata, K. Hosokawa, K. Ichimura, S. Ieki, H. Ikeda, K. Inoue, K. Ishidoshiro, Y. Kamei, N. Kawada, Y. Kishimoto, M. Koga, M. Kurasawa, T. Mitsui, H. Miyake, T. Nakahata, K. Nakamura, R. Nakamura, H. Ozaki, T. Sakai, I. Shimizu, J. Shirai, K. Shiraishi, A. Suzuki, Y. Suzuki, A. Takeuchi, K. Tamae, H. Watanabe, Y. Yoshida, S. Obara, A. K. Ichikawa, S. Yoshida, S. Umehara, K. Fushimi, K. Kotera, Y. Urano, B. E. Berger, B. K. Fujikawa, J. G. Learned, J. Maricic, S. N. Axani, Z. Fu, J. Smolsky, L. A. Winslow, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, S. Dell'Oro, T. O'Donnell, J. A. Detwiler, S. Enomoto, M. P. Decowski, K. M. Weerman, C. Grant, A. Li, H. Song

    Physical Review C　107　(5)　2023/05/22

    Publisher: American Physical Society (APS)

    DOI： 10.1103/physrevc.107.054612 　

    ISSN： 2469-9985

    eISSN： 2469-9993

  3. First measurement of the strange axial coupling constant using neutral-current quasielastic interactions of atmospheric neutrinos at KamLAND

    S. Abe, S. Asami, M. Eizuka, S. Futagi, A. Gando, Y. Gando, T. Gima, A. Goto, T. Hachiya, K. Hata, K. Ichimura, S. Ieki, H. Ikeda, K. Inoue, K. Ishidoshiro, Y. Kamei, N. Kawada, Y. Kishimoto, M. Koga, M. Kurasawa, T. Mitsui, H. Miyake, T. Nakahata, K. Nakamura, R. Nakamura, H. Ozaki, T. Sakai, I. Shimizu, J. Shirai, K. Shiraishi, A. Suzuki, Y. Suzuki, A. Takeuchi, K. Tamae, H. Watanabe, Y. Yoshida, S. Obara, A. K. Ichikawa, S. Yoshida, S. Umehara, K. Fushimi, K. Kotera, Y. Urano, B. E. Berger, B. K. Fujikawa, J. G. Learned, J. Maricic, S. N. Axani, Z. Fu, J. Smolsky, L. A. Winslow, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, J. A. Detwiler, S. Enomoto, M. P. Decowski, C. Grant, A. Li, H. Song, S. Dell’Oro, T. O’Donnell

    Physical Review D　107　(7)　2023/04/19

    Publisher: American Physical Society (APS)

    DOI： 10.1103/physrevd.107.072006 　

    ISSN： 2470-0010

    eISSN： 2470-0029

  4. KamNet: An integrated spatiotemporal deep neural network for rare event searches in KamLAND-Zen

    A. Li, Z. Fu, C. Grant, H. Ozaki, I. Shimizu, H. Song, A. Takeuchi, L. A. Winslow

    Physical Review C　107　(1)　2023/01/30

    Publisher: American Physical Society (APS)

    DOI： 10.1103/physrevc.107.014323 　

    ISSN： 2469-9985

    eISSN： 2469-9993

  5. Search for the Majorana Nature of Neutrinos in the Inverted Mass Ordering Region with KamLAND-Zen

    S. Abe, S. Asami, M. Eizuka, S. Futagi, A. Gando, Y. Gando, T. Gima, A. Goto, T. Hachiya, K. Hata, S. Hayashida, K. Hosokawa, K. Ichimura, S. Ieki, H. Ikeda, K. Inoue, K. Ishidoshiro, Y. Kamei, N. Kawada, Y. Kishimoto, M. Koga, M. Kurasawa, N. Maemura, T. Mitsui, H. Miyake, T. Nakahata, K. Nakamura, K. Nakamura, R. Nakamura, H. Ozaki, T. Sakai, H. Sambonsugi, I. Shimizu, J. Shirai, K. Shiraishi, A. Suzuki, Y. Suzuki, A. Takeuchi, K. Tamae, K. Ueshima, H. Watanabe, Y. Yoshida, S. Obara, A. K. Ichikawa, D. Chernyak, A. Kozlov, K. Z. Nakamura, S. Yoshida, Y. Takemoto, S. Umehara, K. Fushimi, K. Kotera, Y. Urano, B. E. Berger, B. K. Fujikawa, J. G. Learned, J. Maricic, S. N. Axani, J. Smolsky, Z. Fu, L. A. Winslow, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, S. Dell’Oro, T. O’Donnell, J. A. Detwiler, S. Enomoto, M. P. Decowski, C. Grant, A. Li, H. Song

    Physical Review Letters　130　(5)　2023/01/30

    Publisher: American Physical Society (APS)

    DOI： 10.1103/physrevlett.130.051801 　

    ISSN： 0031-9007

    eISSN： 1079-7114

  6. Abundances of Uranium and Thorium Elements in Earth Estimated by Geoneutrino Spectroscopy

    S. Abe, S. Asami, M. Eizuka, S. Futagi, A. Gando, Y. Gando, T. Gima, A. Goto, T. Hachiya, K. Hata, K. Hosokawa, K. Ichimura, S. Ieki, H. Ikeda, K. Inoue, K. Ishidoshiro, Y. Kamei, N. Kawada, Y. Kishimoto, M. Koga, M. Kurasawa, N. Maemura, T. Mitsui, H. Miyake, T. Nakahata, K. Nakamura, K. Nakamura, R. Nakamura, H. Ozaki, T. Sakai, H. Sambonsugi, I. Shimizu, Y. Shirahata, J. Shirai, K. Shiraishi, A. Suzuki, Y. Suzuki, A. Takeuchi, K. Tamae, H. Watanabe, Y. Yoshida, S. Obara, A. K. Ichikawa, S. Yoshida, S. Umehara, K. Fushimi, K. Kotera, Y. Urano, B. E. Berger, B. K. Fujikawa, J. G. Learned, J. Maricic, S. N. Axani, Z. Fu, J. Smolsky, L. A. Winslow, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, A. Li, J. A. Detwiler, S. Enomoto, M. P. Decowski, C. Grant, H. Song, T. O’Donnell, S. Dell’Oro

    Geophysical Research Letters　49　(16)　2022/08/28

    Publisher: American Geophysical Union (AGU)

    DOI： 10.1029/2022gl099566 　

    ISSN： 0094-8276

    eISSN： 1944-8007

  7. A Search for Correlated Low-energy Electron Antineutrinos in KamLAND with Gamma-Ray Bursts

    S. Abe, S. Asami, A. Gando, Y. Gando, T. Gima, A. Goto, T. Hachiya, K. Hata, K. Hosokawa, K. Ichimura, S. Ieki, H. Ikeda, K. Inoue, K. Ishidoshiro, Y. Kamei, N. Kawada, Y. Kishimoto, T. Kinoshita, M. Koga, N. Maemura, T. Mitsui, H. Miyake, K. Nakamura, K. Nakamura, R. Nakamura, H. Ozaki, T. Sakai, H. Sambonsugi, I. Shimizu, J. Shirai, K. Shiraishi, A. Suzuki, Y. Suzuki, A. Takeuchi, K. Tamae, M. Eizuka, M. Kurasawa, T. Nakahata, S. Futagi, H. Watanabe, Y. Yoshida, S. Obara, A. K. Ichikawa, S. Yoshida, S. Umehara, K. Fushimi, B. E. Berger, B. K. Fujikawa, J. G. Learned, J. Maricic, S. N. Axani, J. Smolsky, C. Laber-Smith, L. A. Winslow, Z. Fu, J. Ouellet, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, A. Li, J. A. Detwiler, S. Enomoto, M. P. Decowski, C. Grant, H. Song, T. O’Donnell, S. Dell’Oro

    The Astrophysical Journal　927　(1)　69-69　2022/03/01

    Publisher: American Astronomical Society

    DOI： 10.3847/1538-4357/ac4e7e 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  8. Limits on Astrophysical Antineutrinos with the KamLAND Experiment

    S. Abe, S. Asami, A. Gando, Y. Gando, T. Gima, A. Goto, T. Hachiya, K. Hata, S. Hayashida, K. Hosokawa, K. Ichimura, S. Ieki, H. Ikeda, K. Inoue, K. Ishidoshiro, Y. Kamei, N. Kawada, Y. Kishimoto, T. Kinoshita, M. Koga, N. Maemura, T. Mitsui, H. Miyake, K. Nakamura, K. Nakamura, R. Nakamura, H. Ozaki, T. Sakai, H. Sambonsugi, I. Shimizu, Y. Shirahata, J. Shirai, K. Shiraishi, A. Suzuki, Y. Suzuki, A. Takeuchi, K. Tamae, K. Ueshima, Y. Wada, H. Watanabe, Y. Yoshida, S. Obara, A. K. Ichikawa, A. Kozlov, D. Chernyak, Y. Takemoto, S. Yoshida, S. Umehara, K. Fushimi, S. Hirata, K. Z. Nakamura, M. Yoshida, B. E. Berger, B. K. Fujikawa, J. G. Learned, J. Maricic, S. N. Axani, L. A. Winslow, Z. Fu, J. Ouellet, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, A. Li, J. A. Detwiler, S. Enomoto, M. P. Decowski, C. Grant, T. O’Donnell, S. Dell’Oro

    The Astrophysical Journal　925　(1)　14-14　2022/01/01

    Publisher: American Astronomical Society

    DOI： 10.3847/1538-4357/ac32c1 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  9. Search for Solar Flare Neutrinos with the KamLAND Detector

    S. Abe, S. Asami, A. Gando, Y. Gando, T. Gima, A. Goto, T. Hachiya, K. Hata, S. Hayashida, K. Hosokawa, K. Ichimura, S. Ieki, H. Ikeda, K. Inoue, K. Ishidoshiro, Y. Kamei, N. Kawada, Y. Kishimoto, T. Kinoshita, M. Koga, N. Maemura, T. Mitsui, H. Miyake, K. Nakamura, K. Nakamura, R. Nakamura, H. Ozaki, T. Sakai, H. Sambonsugi, I. Shimizu, J. Shirai, K. Shiraishi, A. Suzuki, Y. Suzuki, A. Takeuchi, K. Tamae, K. Ueshima, Y. Wada, H. Watanabe, Y. Yoshida, S. Obara, A. K. Ichikawa, A. Kozlov, D. Chernyak, Y. Takemoto, S. Yoshida, S. Umehara, K. Fushimi, K. Z. Nakamura, M. Yoshida, B. E. Berger, B. K. Fujikawa, J. G. Learned, J. Maricic, S. N. Axani, L. A. Winslow, Z. Fu, J. Ouellet, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, A. Li, J. A. Detwiler, S. Enomoto, M. P. Decowski, C. Grant, T. O’Donnell, S. Dell’Oro

    The Astrophysical Journal　924　(2)　103-103　2022/01/01

    Publisher: American Astronomical Society

    DOI： 10.3847/1538-4357/ac35d1 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  10. The nylon balloon for xenon loaded liquid scintillator in KamLAND-Zen 800 neutrinoless double-beta decay search experiment

    Y. Gando, A. Gando, T. Hachiya, S. Hayashida, K. Hosokawa, H. Ikeda, T. Mitsui, T. Nakada, S. Obara, H. Ozaki, J. Shirai, K. Ueshima, H. Watanabe, S. Abe, K. Hata, A. Hayashi, Y. Honda, S. Ieki, K. Inoue, K. Ishidoshiro, S. Ishikawa, Y. Kamei, K. Kamizawa, Y. Karino, N. Kawada, T. Kinoshita, M. Koga, S. Matsuda, H. Miyake, K. Nakamura, K. Nemoto, A. Ono, N. Ota, S. Otsuka, Y. Shibukawa, I. Shimizu, Y. Shirahata, K. Soma, A. Suzuki, A.A. Suzuki, T. Takai, A. Takeuchi, K. Tamae, Y. Teraoka, Y. Wada, D. Chernyak, A. Kozlov, S. Yoshida, S. Umehara, Y. Takemoto, K. Fushimi, S. Hirata, C. Grant, A. Li, J.G. Learned, J. Maricic, B.E. Berger, B.K. Fujikawa, S. Fraker, A. Herman, E. Krupczak, G.L. Pease, L.A. Winslow, Y. Efremenko, H.J. Karwowski, D.M. Markoff, W. Tornow, T. O'Donnell, S. Dell'Oro, J.A. Detwiler, S. Enomoto, M.P. Decowski

    Journal of Instrumentation　16　(08)　P08023-P08023　2021/08/01

    Publisher: IOP Publishing

    DOI： 10.1088/1748-0221/16/08/p08023 　

    eISSN： 1748-0221

  11. Low-energy astrophysics with KamLAND

    Nanami Kawada, Shuhei Obara, Koji Ishidoshiro, Seisho Abe, Sachihiro Asami, Azusa Gando, Yoshihito Gando, Tomomi Gima, Anna Goto, Takahiko Hachiya, Kazumi Hata, Shingo Hayashida, Keishi Hosokawa, Koichi Ichimura, Sei Ieki, Haruo Ikeda, Kunio Inoue, Yuto Kamei, Yasuhiro Kishimoto, Tatsuya Kinoshita, Masayuki Koga, Naoya Maemura, Tadao Mitsui, Haruhiko Miyake, Kengo Nakamura, Kosuke Nakamura, Rikuo Nakamura, Hideyoshi Ozaki, Taichi Sakai, Hiroto Sambonsugi, Itaru Shimizu, Junpei Shirai, Kensuke Shiraishi, Atsuto SUZUKI, Yuya Suzuki, Atsuto Takeuchi, Kyoko Tamae, Kota Ueshima, Yoshiki Wada, Hiroko Watanabe, Yuki Yoshida, Atsuko Ichikawa, Alexandre Kozlov, Dmitry CHERNYAK, Yasuhiro Takemoto, Sei Yoshida, Saori Umehara, Ken-Ichi Fushimi, Kazuhiro Nakamura, Masashi Yoshida, Bruce Edmond Berger, Brian Kurt Fujikawa, John Gregory Learned, Jelena Maricic, Spencer N. Axani, Lindley Anne Winslow, Zhenghao Fu, Jonathan Ouellet, Yuri Efremenko, Hugon J. Karwowski, Dian M. Markoff, Werner Tornow, Aobo Li, Jason A. Detwiler, Sanshiro Enomoto, Patric Decowski, Chistopher Grant, Thomas O'Donnell, Stefano Dell'Oro

    Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)　2021/07/29

    Publisher: Sissa Medialab

    DOI： 10.22323/1.395.1163 　

  12. Search for Low-energy Electron Antineutrinos in KamLAND Associated with Gravitational Wave Events

    S. Abe, S. Asami, A. Gando, Y. Gando, T. Gima, A. Goto, T. Hachiya, K. Hata, S. Hayashida, K. Hosokawa, K. Ichimura, S. Ieki, H. Ikeda, K. Inoue, K. Ishidoshiro, Y. Kamei, N. Kawada, Y. Kishimoto, T. Kinoshita, M. Koga, N. Maemura, T. Mitsui, H. Miyake, K. Nakamura, K. Nakamura, R. Nakamura, H. Ozaki, T. Sakai, H. Sambonsugi, I. Shimizu, J. Shirai, K. Shiraishi, A. Suzuki, Y. Suzuki, A. Takeuchi, K. Tamae, K. Ueshima, Y. Wada, H. Watanabe, Y. Yoshida, S. Obara, A. Kozlov, D. Chernyak, Y. Takemoto, S. Yoshida, S. Umehara, K. Fushimi, A. K. Ichikawa, K. Z. Nakamura, M. Yoshida, B. E. Berger, B. K. Fujikawa, J. G. Learned, J. Maricic, S. N. Axani, L. A. Winslow, Z. Fu, J. Ouellet, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, A. Li, J. A. Detwiler, S. Enomoto, M. P. Decowski, C. Grant, T. O’Donnell, S. Dell’Oro

    The Astrophysical Journal　909　(2)　116-116　2021/03/01

    Publisher: American Astronomical Society

    DOI： 10.3847/1538-4357/abd5bc 　

    ISSN： 0004-637X

    eISSN： 1538-4357

  13. Upgrade of the KamLAND-Zen mini-balloon and future prospects

    H. Ozaki, A. Takeuchi

    Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment　958　162353-162353　2020/04

    Publisher: Elsevier BV

    DOI： 10.1016/j.nima.2019.162353 　

    ISSN： 0168-9002

  14. Inner balloon production for KamLAND-Zen 800 Peer-reviewed

    A.Gando, Y.Gando, T.Hachiya, S.Hayashida, K.Hosokawa, H.Ikeda, S.Obara, H.Ozaki, K.Ueshima, H.Watanabe

    Journal of Physics: Conference Series　1468　(1)　012145　2020

    DOI： 10.1088/1742-6596/1468/1/012145 　

  15. Precision Analysis of the Xe136 Two-Neutrino ββ Spectrum in KamLAND-Zen and Its Impact on the Quenching of Nuclear Matrix Elements

    A. Gando, Y. Gando, T. Hachiya, M. Ha Minh, S. Hayashida, Y. Honda, K. Hosokawa, H. Ikeda, K. Inoue, K. Ishidoshiro, Y. Kamei, K. Kamizawa, T. Kinoshita, M. Koga, S. Matsuda, T. Mitsui, K. Nakamura, A. Ono, N. Ota, S. Otsuka, H. Ozaki, Y. Shibukawa, I. Shimizu, Y. Shirahata, J. Shirai, T. Sato, K. Soma, A. Suzuki, A. Takeuchi, K. Tamae, K. Ueshima, H. Watanabe, D. Chernyak, A. Kozlov, S. Obara, S. Yoshida, Y. Takemoto, S. Umehara, K. Fushimi, S. Hirata, B. E. Berger, B. K. Fujikawa, J. G. Learned, J. Maricic, L. A. Winslow, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, T. O’Donnell, J. A. Detwiler, S. Enomoto, M. P. Decowski, J. Menéndez, R. Dvornický, F. Šimkovic

    Physical Review Letters　122　(19)　2019/05/13

    Publisher: American Physical Society (APS)

    DOI： 10.1103/physrevlett.122.192501 　

    ISSN： 0031-9007

    eISSN： 1079-7114

  16. Refurbishment of KamLAND outer detector

    Hideyoshi Ozaki, Junpei Shirai

    Proceedings of 38th International Conference on High Energy Physics — PoS(ICHEP2016)　2017/02/06

    Publisher: Sissa Medialab

    DOI： 10.22323/1.282.1161 　

  17. Search for electron antineutrinos associated with gravitational wave events GW150914 and GW151226 using KamLAND

    KamLAND Collaboration, A. Gando, Y. Gando, T. Hachiya, A. Hayashi, S. Hayashida, H. Ikeda, K. Inoue, K. Ishidoshiro, Y. Karino, M. Koga, S. Matsuda, T. Mitsui, K. Nakamura, S. Obara, T. Oura, H. Ozaki, I. Shimizu, Y. Shirahata, J. Shirai, A. Suzuki, T. Takai, K. Tamae, Y. Teraoka, K. Ueshima, H. Watanabe, A. Kozolov, Y. Takemoto, S. Yoshida, K. Fushimi, A. Piepke, T. I. Banks, B. E. Berger, B. K. Fujikawa, T. O'Donnell, J. G. Learned, J. Maricic, M. Sakai, L. A. Winslow, E. Krupczak, J. Ouellet, Y. Efremenko, H. J. Karwowski, D. M. Markoff, W. Tornow, J. A. Detwiler, S. Enomoto, M. P. Decowski

    2016/06/23

    DOI： 10.3847/2041-8205/829/2/L34 　

    More details Close

    We present a search for low energy antineutrino events coincident with the gravitational wave events GW150914 and GW151226, and the candidate event LVT151012 using KamLAND, a kiloton-scale antineutrino detector. We find no inverse beta-decay neutrino events within $\pm 500$ seconds of either gravitational wave signal. This non-detection is used to constrain the electron antineutrino fluence and the luminosity of the astrophysical sources.

  18. Search for Majorana Neutrinos near the Inverted Mass Hierarchy Region with KamLAND-Zen

    KamLAND-Zen Collaboration

    2016/05/10

    DOI： 10.1103/PhysRevLett.117.082503 　

    More details Close

    We present an improved search for neutrinoless double-beta ($0\nu\beta\beta$) decay of $^{136}$Xe in the KamLAND-Zen experiment. Owing to purification of the xenon-loaded liquid scintillator, we achieved a significant reduction of the $^{110m}$Ag contaminant identified in previous searches. Combining the results from the first and second phase, we obtain a lower limit for the $0\nu\beta\beta$ decay half-life of $T_{1/2}^{0\nu} > 1.07 \times 10^{26}$ yr at 90% C.L., an almost sixfold improvement over previous limits. Using commonly adopted nuclear matrix element calculations, the corresponding upper limits on the effective Majorana neutrino mass are in the range 61-165 meV. For the most optimistic nuclear matrix elements, this limit reaches the bottom of the quasi-degenerate neutrino mass region.

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Misc. 3

  1. Status of KamLAND-Zen 800 (6)

    Ozaki Hideyoshi, KamLAND-Zen collaboration

    Meeting Abstracts of the Physical Society of Japan　73　(0)　59-59　2018

    Publisher: The Physical Society of Japan

    DOI： 10.11316/jpsgaiyo.73.2.0_59 　

  2. 21aCA-10 Report on the refurbishment of KamLAND outer detector

    Ozaki Hideyoshi, KamLAND Collaboration

    Meeting Abstracts of the Physical Society of Japan　71　(0)　130-130　2016

    Publisher: The Physical Society of Japan

    DOI： 10.11316/jpsgaiyo.71.1.0_130 　

    ISSN： 2189-079X

  3. 26aSG-9 Research for Improvement in Detection efficiency of KamLAND Outer Detector

    Ozaki Hideyoshi, KamLAND Collaboration

    Meeting Abstracts of the Physical Society of Japan　70　(0)　80-80　2015

    Publisher: The Physical Society of Japan

    DOI： 10.11316/jpsgaiyo.70.2.0_80 　

    ISSN： 2189-079X

Books and Other Publications 2

  1. KamLAND-Zen による逆階層構造領域での0νββ崩壊探索の開始

    尾﨑 秀義

    高エネルギーニュース第 41 巻 4 号　2023

  2. ニュートリノは神の粒子か？ - 神岡地下1000mで進む0νββ発見への挑戦 -

    筑波大/飯田崇史、東北大/尾崎秀義、石徹白晃治

    高エネルギー物理学研究者会議　2020/12

Presentations 14

  1. Xenon-loaded liquid scintillator for KamLAND-Zen, Sendai, Japan Invited

    H.Ozaki

    UGAP2024　2024/03/04

  2. Machine learning status and prospects in KamLAND-Zen, Hawaii, USA Invited

    H.Ozaki

    2023 Fall Meeting of APS DNP and JPS　2023/11/26

  3. KamLAND-Zen and machine learning, Canfranc, Spain Invited

    H.Ozaki

    NEXT-Zen Spain-Japan Workshop　2023/09/05

  4. Kamland Zen, La Thuile, Italy Invited

    H.Ozaki

    57th Rencontres de Moriond - EW+U 2023　2023/03/18

  5. KamLAND-Zenの最新結果と展望

    尾崎秀義

    第7回 宇宙素粒子若手の会 秋の研究会　2022/12/09

  6. Current status and prospects of KamLand-Zen

    H.Ozaki, for the KamLAND-Zen collaboration

    International Workshop on Next Generation Nucleon Decay and Neutrino Detectors 2022　2022/09/29

  7. KamLAND-Zenによる最新結果と0νBB探索実験の展望

    尾崎秀義

    日本物理学会2022年秋季大会 共催シンポジウム　2022/09/10

  8. KamLAND-Zen 800

    Hideyoshi Ozaki

    18th Rencontres du Vietnam　2022/07/20

  9. KamLAND-ZenにおけるNNの利用と開発現状

    尾崎秀義

    第１回ML@HEPワークショップ　2022/07/09

  10. Neutrinoless double-beta decay search results from KamLAND-Zen with 1 ton-year 136Xe exposure Invited

    Hideyoshi Ozaki

    International Workshop on Applications of Noble Gas Xenon to Science and Technology (XeSAT2022)　2022/05/26

  11. KamLAND-Zen 800

    Hideyoshi Ozaki

    XIX International Workshop on Neutrino Telescopes　2021/02/23

  12. Status of KamLAND-Zen 800 (6)

    Ozaki Hideyoshi, KamLAND-Zen collaboration

    Meeting Abstracts of the Physical Society of Japan　2018

  13. 21aCA-10 Report on the refurbishment of KamLAND outer detector

    Ozaki Hideyoshi, KamLAND Collaboration

    Meeting Abstracts of the Physical Society of Japan　2016

  14. 26aSG-9 Research for Improvement in Detection efficiency of KamLAND Outer Detector

    Ozaki Hideyoshi, KamLAND Collaboration

    Meeting Abstracts of the Physical Society of Japan　2015

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Research Projects 4

  1. 大型液体シンチレータ検出器で探る物質粒子の起源

    石徹白 晃治, 尾崎 秀義, 川田 七海

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 学術変革領域研究(A)

    Institution: 東北大学

    2024/04/01 - 2029/03/31

  2. 0ν2β探索のためのリアルタイムデータ圧縮と長寿命核除去の統合的開発

    尾崎 秀義

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 若手研究

    Institution: 東北大学

    2025/04 - 2029/03

  3. 高感度0νββ探索のための高圧XeLSの開発研究

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    Institution: Tohoku University

    2022/04 - 2024/03

  4. 大型液体シンチレータ検出器でのマヨラナニュートリノ発見に向けた研究開発

    尾﨑 秀義

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業 特別研究員奨励費

    Category: 特別研究員奨励費

    Institution: 東北大学

    2017/04/26 - 2020/03/31

    More details Close

    ニュートリノは、未だディラック粒子かマヨラナ粒子かわかっていない。ニュートリノがマヨラナ粒子であれば、宇宙に物質だけが存在する理由やニュートリノの軽い質量を説明できる理論の鍵となる。ニュートリノのマヨラナ性は、ニュートリノを伴わない二重ベータ崩壊を観測することで検証することができる。本研究は、大型液体シンチレータ検出器KamLANDを用いて、ニュートリノを伴わない二重ベータ崩壊探索を行うためのものである。 ニュートリノを伴わない二重ベータ崩壊は、136キセノン原子核においての半減期が約10の26乗年以上という極めて稀な事象である。その発見には、観測の妨げとなる背景事象をいかに少なくするかが重要となる。 KamLAND-Zenは大型液体シンチレータ検出器KamLANDに、放射性不純物の極端に少ない容器であるミニバルーンをインストールしてその中に二重ベータ崩壊核である136キセノンを導入して観測を行なっている。キセノンを約400 kg使用したフェースで2016年に世界最高感度の結果を出したが、ニュートリノを伴わない二重ベータ崩壊の発見には至らなかった。2017年度は、キセノンを約400 kgから約800 kgへ倍増するのに加え、ミニバルーンの放射性不純物を少なくし有効体積の増加をすることを目的に、体積が約２倍のミニバルーンの作製を行った。クラス１以下のクリーンルームにおいて以前のミニバルーン製作の際よりも徹底された清浄度の下、半径約2mのミニバルーンを完成させた。 また、800kgフェーズの次期計画に向けて検出器を改善するための研究として、大光量下での光電子増倍管の振る舞いについて調査し理解を深めた。

Teaching Experience 1

  1. Introductory Science Experiments　Tohoku University

Other 1

  1. 産経新聞(東北版)広告2023年2月22日