原子炉ニュートリノによるニュートリノ振動パラメータの精密測定

• Project/Area Number: 13F03320
• Research Category: Grant-in-Aid for JSPS Fellows
• Allocation Type: Single-year Grants
• Section: 外国
• Research Field: 素粒子・原子核・宇宙線・宇宙物理(実験)
• Research Institution: Tohoku University
• Principal Investigator: 末包 文彦 東北大学, ニュートリノ科学研究センター, 准教授 (10196678)
• Co-Investigator(Kenkyū-buntansha): JUNQUEIRA DE CASTRO BEZERRA THIAGO 東北大学, ニュートリノ科学研究センター, 外国人特別研究員 ; JUNQUEIRA DE CASTRO BEZERRA Thiago 東北大学, ニュートリノ科学研究センター, 外国人特別研究員 ; JUNQUEIRA DE CASTRO Bezerra Thiago 東北大学, 大学院理学研究科, 外国人特別研究員
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥2,300,000 (Direct Cost: ¥2,300,000); Fiscal Year 2015: ¥500,000 (Direct Cost: ¥500,000); Fiscal Year 2014: ¥1,000,000 (Direct Cost: ¥1,000,000); Fiscal Year 2013: ¥800,000 (Direct Cost: ¥800,000)
• Keywords: ニュートリノ振動 / θ13 / Double Chooz / ニュートリノ / 混合角 / 質量 / 原子炉 / Global解析

Outline of Annual Research Achievements

＊近距離ニュートリノ検出器のデータ収集と解析．
H26年度後半に近距離ニュートリノ検出器の建設とコミッショニングを終了させ、H27年初めから物理データの収集を始めた．H27年度は、このデータ収集を続けるとともに、キャリブレーションデータなどを使い、データ解析の準備を行った．生データから物理解析ができるデータに変換するプロセスを開発し、解析を行い、H28年3月に近距離検出器と遠距離検出器のデータを用いた、初めてのθ13の高精度測定結果(preliminary)をモリオン国際会議で発表した．結果は、sin**22Th13 = 0.111 +/- 0.018 である．これはダヤベイの先行結果とは、1.6σの確度で離れており、ニュートリノ振動研究のコミュニティへの大きな問題提起となった．今後は、測定精度を改良し、この問題を追及して行く．
＊エルゼビアが出版する Nuclear Physics Bの、2015年の梶田教授、マクドナルド教授のノーベル賞受賞の記念号へ、末包とBezerraが、ダブルショーグループを代表して寄稿した．ダブルショーの物理結果と原子炉ニュートリノによるθ13測定の歴史についての論文を投稿した．

Research Progress Status

27年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

27年度が最終年度であるため、記入しない。

Research Products

• [Int'l Joint Research] APC/IRFU/Subatech(フランス)
• [Int'l Joint Research] Argonne National Lab./Univ. of Chicago/Columbia Univ.(米国)
• [Int'l Joint Research] CIEMAT(スペイン)
• [Int'l Joint Research] MPIK/TUM/RWTH(ドイツ)
• [Int'l Joint Research] INR/IPC/RRC Kurchatov Institute(ロシア連邦)
• [Int'l Joint Research]
• [Journal Article] Double Chooz and a history of reactor theta13 Experiments (2016)
  • Author(s): F.Suekane, T.J.C.Bezerra
  • Journal Title: Nuclear Physics B Volume: 未定 Pages: 74-93
  • DOI: 10.1016/j.nuclphysb.2016.04.008
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Muon capture on light isotopes in Double Chooz (2016)
  • Author(s): F.Suekane, T.J.C.Bezerra, Y. Abe, T. Abrah, H. Almazan, C. Alt, S. Appel, J.C. Barriere, E. Baussan, I. Bekman, M. Bergevin, L. Bezrukov, E. Blucher, T. Brugire, C. Buck, J. Busenitz, A. Cabrera, L. Camilleri, R. Carr, et. al.
  • Journal Title: Physical Review C Volume: 93 Issue: 5 Pages: 054608-054608
  • DOI: 10.1103/physrevc.93.054608
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Measurement of θ13 in Double Chooz using neutron captures on hydrogen with novel background rejection techniques (2016)
  • Author(s): Y. Abe, M. Kuze, and the Double Chooz collaboration
  • Journal Title: Journal of High Energy Physics Volume: 1601 Issue: 1 Pages: 163-163
  • DOI: 10.1007/jhep01(2016)163
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] A White Paper on keV Sterile Neutrino Dark Matter (2016)
  • Author(s): M. Drewes (ed.), F.Suekane, et al.
  • Journal Title: arXive Volume: 1602.04816 Pages: 1-1
  • Int'l Joint Research
• [Journal Article] Ortho-positronium observation in the Double Chooz experiment (2014)
  • Author(s): Y. Abe et al.
  • Journal Title: Journal of High Energy Physics Volume: 10 Issue: 10 Pages: 032-032
  • DOI: 10.1007/jhep10(2014)032
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Improved measurements of the neutrino mixing angle θ13 with the Double Chooz detector (2014)
  • Author(s): Y. Abe, J.C. dos Anjos, J.C. Barriere, E. Baussan, I. Bekman, M. Bergevin, T.J.C. Bezerra, L. Bezrukov, E. Blucher, C. Buck, J. Busenitz, A. Cabrera, E. Caden, L. Camilleri, R. Carr, M. Cerrada, P.-J. Chang, E. Chauveau, P. Chimenti, A.P. Collin, et al. (Double Chooz Collaboration)
  • Journal Title: JHEP Volume: 1410 Issue: 2 Pages: 086-086
  • DOI: 10.1007/jhep02(2015)074
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Precision Muon Reconstruction in Double Chooz (2014)
  • Author(s): Y. Abe, J.C. dos Anjos, J.C. Barriere, E. Baussan, I. Bekman, M. Bergevin, T.J.C. Bezerra, L. Bezrukov, E. Blucher, C. Buck, J. Busenitz, A. Cabrera, E. Caden, L. Camilleri, R. Carr, M. Cerrada, P.-J. Chang, E. Chauveau, P. Chimenti, A.P. Collin, et al. (Double Chooz Collaboration)
  • Journal Title: Nucl.Inst.Meth.Phys.Res. Volume: A
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Background Independent Measurement of θ13 in Double Chooz (2014)
  • Author(s): Y. Abe, J.C. dos Anjos, J.C. Barriere, E. Baussan, I. Bekman, M. Bergevin, T.J.C. Bezerra, L. Bezrukov, E. Blucher, C. Buck, J. Busenitz, A. Cabrera, E. Caden, L. Camilleri, R. Carr, M. Cerrada, P.-J. Chang, E. Chauveau, P. Chimenti, A.P. Collin, et al. (Double Chooz Collaboration)
  • Journal Title: Phys.Lett. Volume: B735 Pages: 51-56
  • DOI: 10.1016/j.physletb.2014.04.045
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Double Chooz実験の現状と今後 (2014)
  • Author(s): 松原綱之、Emmanuel Chauveau
  • Journal Title: 高エネルギーニュース Volume: 33-3 Pages: 187-195
  • Open Access / Acknowledgement Compliant
• [Journal Article] Background-independent measurement of theta13 in Double Chooz (2014)
  • Author(s): Y. Abe, et al. (Double Chooz Collaboration)
  • Journal Title: Phys. Rev. B Volume: (印刷中)
  • Peer Reviewed
• [Journal Article] A Global Fit Determination of Effective Δm^2_<31> from Baseline Dependen ce of Reactor ν_e Disappearance (2013)
  • Author(s): T. J. C. Bezerra, H. Furuta, F. Suekane, T. Matsubara
  • Journal Title: Physics Letter B Volume: 725 Issue: 4-5 Pages: 271-276
  • DOI: 10.1016/j.physletb.2013.07.028
  • Peer Reviewed
• [Journal Article] First Measurement of Theta13 from Delayed Neutron Capture on Hydrogen in the Double Chooz Experiment (2013)
  • Author(s): Y. Abe, et al., (Double Chooz Collaboration)
  • Journal Title: Phys. Lett. B Volume: 723 Issue: 1-3 Pages: 66-70
  • DOI: 10.1016/j.physletb.2013.04.050
  • Peer Reviewed
• [Journal Article] Direct Measurement of Backgrounds using Reactor-Off Data in Double Chooz (2013)
  • Author(s): Y. Abe, et al.
  • Journal Title: Physical Review D Volume: 87 Issue: 1 Pages: 11102-11102
  • DOI: 10.1103/physrevd.87.011102
  • Peer Reviewed
• [Presentation] R&D Experience for KamLAND 3M liter Liquid Scintillator Detector (2016)
  • Author(s): F.Suekane
  • Organizer: Frontiers of Liquid Scintillator Technology (FroST16)
  • Place of Presentation: Fermilab, Chicago, USA
  • Year and Date: 2016-03-20
  • Int'l Joint Research / Invited
• [Presentation] Hunt for Steriles: Decay at Rest (DAR) Experiments (2015)
  • Author(s): F.Suekane
  • Organizer: Prospects in Neutrino Physics (Nuphys2015)
  • Place of Presentation: London, U.K.
  • Year and Date: 2015-12-18
  • Int'l Joint Research / Invited
• [Presentation] The Double Chooz experiment: June 2015 results and prospects to the near detector era (2015)
  • Author(s): T.J.C.Bezerra
  • Organizer: 17th Lomonosov Conference on Elementary Particle Physics
  • Place of Presentation: Moscow State Univ. Moscow, Russia
  • Year and Date: 2015-08-20
  • Int'l Joint Research / Invited
• [Presentation] Complementarity of T2K/HK with Other Longer Baseline Experiments (2015)
  • Author(s): F.Suekane
  • Organizer: Workshop for Neutrino Programs with Facilities in Japan
  • Place of Presentation: J-PARC, Tokai, Japan
  • Year and Date: 2015-08-05
  • Int'l Joint Research / Invited
• [Presentation] The Double Chooz Experiment June 2015 Results (2015)
  • Author(s): T.J.C.Bezerra
  • Organizer: 東北大 RCNS セミナー
  • Place of Presentation: 東北大 RCNS (仙台)
  • Year and Date: 2015-07-27
  • Invited
• [Presentation] Precise measurement of neutrino oscillation angle theta_13 using reactor neutrinos (Poster) (2015)
  • Author(s): T.J.C.Bezerra & E.Chauveau
  • Organizer: 4th Joint workshop of the France-Japan(TYL/FJPPL) and France-Korea(FKPPL) International Associated Particle Physics Laboratories
  • Place of Presentation: OIST, Okinawa, Japan
  • Year and Date: 2015-05-20
  • Int'l Joint Research / Invited
• [Presentation] Neutrino Oscillations: Where are we now and where to go ? (2015)
  • Author(s): F.Suekane
  • Organizer: LPNHE Physics Seminar
  • Place of Presentation: LPNHE, Paris, France
  • Year and Date: 2015-04-02
  • Int'l Joint Research / Invited
• [Presentation] Improvement of θ13 Measurement in the Double Chooz Experiment and the First Effective Dm31^2 Measurement from Reactor Neutrino Oscillation at Different Baselines (2015)
  • Author(s): Thiago Junqueira De Castro Bezerra
  • Organizer: 日本物理学会 若手奨励賞受賞記念講演
  • Place of Presentation: 早稲田大学、東京
  • Year and Date: 2015-03-21
  • Invited
• [Presentation] Status of Double Chooz Near Detector (2014)
  • Author(s): Thiago Junqueira De Castro Bezerra
  • Organizer: 日本物理学会
  • Place of Presentation: 佐賀大学、佐賀
  • Year and Date: 2014-10-07
• [Presentation] Status of the Double Chooz Near Detector Construction (2014)
  • Author(s): Thiago Junqueira C. Bezerra
  • Organizer: 日本物理学会
  • Place of Presentation: 東海大学
  • Year and Date: 2014-03-27
• [Presentation] Global Fit of the Reactor Neutrino Experiments Data (2013)
  • Author(s): Thiago Junqueira C. Bezerra
  • Organizer: 日本物理学会
  • Place of Presentation: 高知大学
  • Year and Date: 2013-09-20
• [Presentation] Double Chooz Results on Theta13 and Beyond. (2013)
  • Author(s): Thiago Junqueira C. Bezerra
  • Organizer: Interantional Workshop on "RENO-50" toward Neutrino Mass Hierarchy
  • Place of Presentation: SNU, Korea
  • Year and Date: 2013-06-13
  • Invited
• [Book] Neutrino Oscillations: A Practical Guide to Basics and Applications (2015)
  • Author(s): F.Suekane
  • Total Pages: 185
  • Publisher: Springer
• [Book] Double Chooz and Reactor Neutrino Oscillation (2014)
  • Author(s): Thiago Junqueira Castro de Bezerra
  • Total Pages: 200
  • Publisher: Springer
• [Book] Double Chooz and reactor neutrino oscillation : theta13 improvement and first effective Delta m_{31}^2 measurement (2014)
  • Author(s): Thiago Junqueira C. Bezerra
  • Total Pages: 180
  • Publisher: Springer
• [Remarks] http://www.awa.tohoku.ac.jp/~suekane/
• [Remarks] Double Chooz Japan
  • URL: http://dchooz.titech.jp.hep.net
• [Remarks] ニュートリノ振動実験Double Chooz
  • URL: http://dchooz.titech.jp.hep.net
• [Remarks] 末包文彦のホームページ
  • URL: http://www.awa.tohoku.ac.jp/~suekane/
• [Remarks] Double Chooz Japanホームページ
  • URL: http://dchooz.titech.jp.hep.net/