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2013 Fiscal Year Final Research Report

Search for cosmic-ray antideuteron and antihelium with long duration balloon flight data

Research Project

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Project/Area Number 22540322
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionOkayama University (2012-2013)
High Energy Accelerator Research Organization (2010-2011)

Principal Investigator

YOSHIMURA KOJI  岡山大学, その他部局等, 教授 (50272464)

Co-Investigator(Kenkyū-buntansha) HASEGAWA Masaya  高エネルギー加速器研究機構, 素粒子原子核研究所, 助教 (60435617)
YAMAMOTO Akira  高エネルギー加速器研究機構, 超伝導低温工学センター, 教授 (30113418)
Research Collaborator SAKAI Kenichi  NASA Goddard Space Flight Center
SASAKI Makoto  NASA Goddard Space Flight Center
Project Period (FY) 2010-04-01 – 2013-03-31
KeywordsESS-Polar / 南極周回飛翔 / 物質反物質非対称性 / 暗黒物質 / 原始ブラックホール / 初期宇宙
Research Abstract

We have searched for cosmic-ray antideuteron and antihelium with BESS-Polar II data. We carefully examined the recovered BESS-PolarII payload from Antarctica and obtained various key information about the detector status during the flight and improved detector performance with the novel calibration method. Based on the data, new searches were performed for antideuteron and antihelium with improved sensitivity by an order of magnitude. No candidates were observed. Null observation of antihelium, together with previous BESS data, placed the most stringent constraint on existence of anti-domain nearby our universe.

  • Research Products

    (9 results)

All 2013 2012 2011 2010

All Journal Article (4 results) (of which Peer Reviewed: 3 results) Presentation (5 results)

  • [Journal Article] Search for cosmic-ray antiproton origins and for cosmological antimatter with BESS2013

    • Author(s)
      A. Yamamoto, J.Mitchel, K. Yoshimura, M. Hasegawa, et al., (38名)
    • Journal Title

      Adv.Space Res.

      Volume: 51 Pages: 227-233

    • DOI

      10.1016/j.asr.2011.07.012

    • Peer Reviewed
  • [Journal Article] Search for Antihelium with the BESS-Polar Spectrometer2012

    • Author(s)
      K.Abe, A. Yamamoto, K. Yoshimura, M. Hasegawa, et al., (36名)
    • Journal Title

      Phys. Rev. Lett.

      Volume: 108 Pages: 131301-1-4

    • DOI

      10.1103/PhysRevLett.108.131301

    • Peer Reviewed
  • [Journal Article] Measurement of the cosmic-ray antiproton spectrum at solar minimum with a long-duration balloon flight over Antarctica2012

    • Author(s)
      K.Abe, A. Yamamoto, K. Yoshimura, M. Hasegawa, et al., (29名)
    • Journal Title

      Phys. Rev. Lett.

      Volume: 108 Pages: 051102-1-4

    • DOI

      10.1103/PhysRevLett.108.051102

    • Peer Reviewed
  • [Journal Article] Search for cosmic-ray antideuterons with BESS-Polar2011

    • Author(s)
      K. Yoshimura et al.
    • Journal Title

      Proceedings of 32^<nd> ICRC

      Volume: 5 Pages: 195-198

  • [Presentation] Search for cosmic-ray antideutron with BESS-Polar2013

    • Author(s)
      K.Yoshimura
    • Organizer
      33rd Intl. Cosmic Ray Conf.
    • Place of Presentation
      Rio de Janeiro
    • Year and Date
      20130700
  • [Presentation] The Scientific Highlights from the Balloon-Borne Experiment with a Superconducting Spectrometer - Polar (BESS-Polar)2012

    • Author(s)
      K.Yoshimura
    • Organizer
      39th COSPAR Scientific Assembly
    • Place of Presentation
      Mysore, India
    • Year and Date
      20120700
  • [Presentation] Precision Measurement of Cosmic-ray Antiproton Spectrum and Search for Antimatter with BESS2011

    • Author(s)
      K.Yoshimura
    • Organizer
      LEAP 2011
    • Place of Presentation
      Vancouver
    • Year and Date
      20110400
  • [Presentation] Search for novel origins of cosmic-ray antiprotons and antimatter with BESS-Polar flight over Antarctica2010

    • Author(s)
      K.Yoshimura
    • Organizer
      35th ICHEP
    • Place of Presentation
      Paris
    • Year and Date
      20100700
  • [Presentation] Search for Cosmic-ray Antiproton Origins and for Cosmological Antimatter with BESS2010

    • Author(s)
      K.Yoshimura
    • Organizer
      38th COSPAR Scientific Assembly
    • Place of Presentation
      Bremen
    • Year and Date
      20100700

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Published: 2015-07-16  

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