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2013 Fiscal Year Final Research Report

Measurement of particle-antiparticle symmetry breaking in neutrinos and R&D for the future

Research Project

  • PDF
Project/Area Number 23340056
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionThe University of Tokyo

Principal Investigator

SHIOZAWA Masato  東京大学, 宇宙線研究所, 准教授 (70272523)

Co-Investigator(Kenkyū-buntansha) HAYATO Yoshinari  東京大学, 宇宙線研究所, 准教授 (60321535)
Co-Investigator(Renkei-kenkyūsha) MIURA Makoto  東京大学, 宇宙線研究所, 助教 (10272519)
NAKAYAMA Shoei  東京大学, 宇宙線研究所, 特任助教 (70401289)
Project Period (FY) 2011-04-01 – 2014-03-31
Keywordsニュートリノ / CP対称性 / CPT対称性 / スーパーカミオカンデ / 大気ニュートリノ
Research Abstract

This research aimed to understand more about the three flavor framework of lepton particles by experimental tests of particle-antiparticle symmetry violation in neutrinos. We have looked for possible difference between neutrino oscillations and antineutrino oscillations in the atmospheric neutrino data by world largest neutrino oscillation detector Super-Kamiokande. We tested two hypotheses - CP and CPT symmetry violation - and found no evidence of symmetry violation and concluded that both CP and CPT symmetries are conserved within the experimental errors.

  • Research Products

    (8 results)

All 2014 2013 Other

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (5 results) Remarks (1 results)

  • [Journal Article] スーパーカミオカンデコラボレーション, Evidence for the Appearance of Atmospheric Tau Neutrinos in Super-Kamiokande2013

    • Author(s)
      塩澤眞人, 早戸良成, 三浦真, 中山祥英, 他
    • Journal Title

      Phys. Rev. Lett

      Volume: 110 Pages: 181802

    • DOI

      10.1103/PhysRevLett.110.181802

    • Peer Reviewed
  • [Journal Article] Future long-baseline neutrino facilities and detectors2013

    • Author(s)
      塩澤眞人, 他
    • Journal Title

      Advances in High Energy Physics

      Volume: Volume2013 Pages: 460123

    • DOI

      10.1155/2013/460123

    • Peer Reviewed
  • [Presentation] Projects in Japan2014

    • Author(s)
      塩澤眞人
    • Organizer
      Les Rencontres de Physique de la Vall, Aie d'Aoste
    • Place of Presentation
      La Thuile, Italy
    • Year and Date
      20140223-0301
  • [Presentation] Nucleon Decay Searches2013

    • Author(s)
      塩澤眞人
    • Organizer
      13th International Conference on Topics in Astroparticle and Underground Physics
    • Place of Presentation
      California, USA
    • Year and Date
      20130908-13
  • [Presentation] Future Neutrino and Nucleon Decay Program2013

    • Author(s)
      塩澤眞人
    • Organizer
      26th International Symposium on Lepton Photon Interactions at High Energies
    • Place of Presentation
      San Francisco, USA
    • Year and Date
      20130624-29
  • [Presentation] Super-K, T2K, and beyond2013

    • Author(s)
      塩澤眞人
    • Organizer
      2013年理論懇シンポジウム
    • Place of Presentation
      千葉
    • Year and Date
      2013-12-25
  • [Presentation] 大気ニュートリノ研究とハイパーカミオカンデ準備研究2013

    • Author(s)
      塩澤眞人
    • Organizer
      ニュートリノフロンティアの融合と進化研究会
    • Place of Presentation
      東京
    • Year and Date
      2013-04-21
  • [Remarks]

    • URL

      http://www-sk.icrr.u-tokyo.ac.jp/index.html

URL: 

Published: 2015-06-25  

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