Detailed study on tau neutrino physics at the SHiP experiment

• Project/Area Number: 17H02887
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Nagoya University
• Principal Investigator: Komatsu Masahiro 名古屋大学, 教養教育院, 准教授 (80345842)
• Project Period (FY): 2017-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥16,510,000 (Direct Cost: ¥12,700,000、Indirect Cost: ¥3,810,000); Fiscal Year 2019: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2018: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000); Fiscal Year 2017: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
• Keywords: タウニュートリノ / ニュートリノ / 原子核乾板 / スペクトロメーター

Outline of Final Research Achievements

Tau neutrino is the least known elementally particle among 6 quarks and 6 lepton family. We proposed the SHiP experiment aiming to study tau neutrino properties with three order of magnitude larger statistics than previous discovery experiment. In 2015, we proposed experiment, since then, we carry out test experiments and detector optimization for the comprehensive design study report. In 2019, we finalize the report.

Academic Significance and Societal Importance of the Research Achievements

タウニュートリノはその発見以来最もその性質が調べられていない基本粒子で、特にノーベル賞も与えられたニュートリノ質量の発見が示唆する標準理論を超える物理への糸口として注目が集まっている。宇宙論からも存在が示唆されるも未だ発見に至らないダークマターの解明につながる有力な糸口が第3世代レプトンのタウニュートリノである。
近年Ｂ中間子のタウニュートリノを崩壊にあおて、理論予想からのズレが複数の実験から報告され、ますますタウニュートリノの重要性は高まっている。ダークマターの解明や標準理論を超える物理への糸口としてタウニュートリノの詳細研究実験を実施することは重要で、その計画立案に大きな役割を果たした。

Research Products

• [Int'l Joint Research] CERN/0Ecole Polytechnique de Lausanne/Physik-Institut, Universit¨ at Z¨urich(スイス)
• [Int'l Joint Research] Sezione INFN di Napoli/Laboratori Nazionali di Frascati/0Sezione INFN di Cagliari(イタリア)
• [Int'l Joint Research] Moscow State University/National Research Nuclear University/Joint Institute for Nuclear Research(ロシア連邦)
• [Int'l Joint Research] University of Warwick/Imperial College London/University College London(英国)
• [Int'l Joint Research] Universit¨at Hamburg, Hamburg/Johannes Gutenberg Universit ¨at Mainz/Universit¨at Bonn(ドイツ)
• [Int'l Joint Research]
• [Int'l Joint Research] CERN/0Ecole Polytechnique de Lausanne/Physik-Institut, Universit¨at Z¨urich(スイス)
• [Int'l Joint Research] Sezione INFN di Napoli/Laboratori Nazionali di Frascati/0Sezione INFN di Cagliari(イタリア)
• [Int'l Joint Research] Moscow State University/National Research Nuclear University/Joint Institute for Nuclear Research(ロシア連邦)
• [Int'l Joint Research] University of Warwick/Imperial College London/University College London(英国)
• [Int'l Joint Research] Universit¨at Hamburg, Hamburg/Johannes Gutenberg Universit¨at Mainz/Universit¨at Bonn(ドイツ)
• [Int'l Joint Research]
• [Journal Article] DsTau: Study of tau neutrino production with 400 GeV protons from the CERN-SPS (2020)
  • Author(s): S. Aoki, A. Ariga, T. Ariga, 他27名
  • Journal Title: Journal of High Energy Physics Volume: 33 Issue: 1 Pages: 033-033
  • DOI: 10.1007/jhep01(2020)033
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Final results on neutrino oscillation parameters from the OPERA experiment in the CNGS beam (2019)
  • Author(s): N. Agafonova, T. Fukuda, T. Matsuo, S. Mikado, S. Ogawa, H. Shibuya et al. (OPERA Collaboration)
  • Journal Title: Physical Review D Volume: 100 Issue: 5 Pages: 0513011-8
  • DOI: 10.1103/physrevd.100.051301
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Fast simulation of muons produced at the SHiP experiment using Generative Adversarial Networks (2019)
  • Author(s): C. Ahdida, S. Ogawa, H. Shibuya et al. (SHiP Collaboration)
  • Journal Title: Journal of Instrumentation Volume: 14 Issue: 11 Pages: P11028-P11028
  • DOI: 10.1088/1748-0221/14/11/p11028
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Development of a balloon-style pressure vessel gondola for balloon-borne emulsion gamma-ray telescopes (2019)
  • Author(s): H. Rokujo, M. Komiyama, S. Aoki, K. Hamada, T. Hara et al.
  • Journal Title: JINST Volume: 14(2019)09 Issue: 09 Pages: P09009-P09009
  • DOI: 10.1088/1748-0221/14/09/p09009
  • Peer Reviewed / Open Access
• [Journal Article] Sensitivity of the SHiP experiment to Heavy Neutral Leptons (2019)
  • Author(s): SHiP Collaboration (C. Ahdida (CERN) et al.).
  • Journal Title: JHEP Volume: 1904 Issue: 4 Pages: 077-077
  • DOI: 10.1007/jhep04(2019)077
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Final results of the search for νμ → νe oscillations with the OPERA detector in the CNGS beam (2018)
  • Author(s): N. Agafonova, T. Fukuda, T. Matsuo, S. Mikado, S. Ogawa, H. Shibuya et al. (OPERA collaboration)
  • Journal Title: Journal of High Energy Physics Volume: 2018 Issue: 6 Pages: 151-151
  • DOI: 10.1007/jhep06(2018)151
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Final Results of the OPERA Experiment on ντ Appearance in the CNGS Neutrino Beam (2018)
  • Author(s): OPERA Collaboration (N. Agafonova (Moscow, INR) et al.).
  • Journal Title: Phys.Rev.Lett. Volume: 120 Issue: 13 Pages: 211801-211801
  • DOI: 10.1103/physrevlett.121.139901
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The active muon shield in the SHiP experiment (2017)
  • Author(s): SHiP Collaboration (A. Akmete et al.)
  • Journal Title: Journal of Instrumentation Volume: 12 Issue: 05 Pages: P05011-P05011
  • DOI: 10.1088/1748-0221/12/05/p05011
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] SHiP: a new facility with a dedicated detector for studying tau neutrino properties (2017)
  • Author(s): SHiP Collaboration (M. Komatsu (Nagoya U.) for the collaboration).
  • Journal Title: Nucl.Part.Phys.Proc. Volume: 287-288 Pages: 151-153
  • DOI: 10.1016/j.nuclphysbps.2017.03.065
  • Int'l Joint Research
• [Journal Article] High-resolution tracking in a GEM-Emulsion detector (2017)
  • Author(s): A. Alexandrov (INFN, Naples) et al..
  • Journal Title: JINST Volume: 12 Issue: 09 Pages: P09001-P09001
  • DOI: 10.1088/1748-0221/12/09/p09001
  • Peer Reviewed
• [Presentation] SHiP実験におけるタウニュートリノ研究 (2019)
  • Author(s): 小松 雅宏
  • Organizer: 日本物理学会秋季大会
• [Presentation] SHiP実験計画におけるタウニュートリノのレプトンユニバーサリティ検証 (2019)
  • Author(s): 小松雅宏
  • Organizer: 日本物理学科2019年年次大会
• [Presentation] OPERA実験の最終結果とSHiP実験計画におけるタウニュートリノ物理 (2018)
  • Author(s): 小松雅宏
  • Organizer: 日本物理学会2018年秋季大会
• [Presentation] SHiP実験計画におけるニュートリノ物理 (2017)
  • Author(s): 小松雅宏
  • Organizer: 日本物理学会秋季大会 宇都宮大学峰キャンパス