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Search for new phenomena in the FCNC rare decays of neutral K meson

Research Project

Project/Area Number 20540295
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 InstitutionSaga University

Principal Investigator

SUZUKI Shiro  Saga University, 工学系研究科, 教授 (50089851)

Co-Investigator(Kenkyū-buntansha) WATANABE Hiroaki  高エネルギー加速器研究機構, 素粒子原子核研究所, 助教 (00415043)
Research Collaborator OGATA Risa  佐賀大学, 大学院・工学系研究科, 博士後期課程学生
Project Period (FY) 2008 – 2010
Project Status Completed (Fiscal Year 2010)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2010: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2009: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2008: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords素粒子(実験) / KL稀崩壊 / FCNC / 標準理論を超える物理 / 新現象の寄与 / X(214MeV / c^2)
Research Abstract

FCNC rare decays, which are suppressed in the Standard model (SM), are sensitive to ontributions from unknown particles, and are ideal places to look for new phenomena beyond the SM and examine the various phenomenological models. We have analyzedthe K_L→π^0π^0X(X=μμ)process and made a search for X(214) particle in theμμfinal state. We settled the upper limit of the production and decay (1.6x10^-6). Also we have made a study of KL π^0π^0・υυdecay, which gives the ? parameter in the Kobayashi-Maskawa matrix, and gotten the results which made an order of magnitude improvement on the upper limit of the decay branching fraction.

Report

(4 results)
  • 2010 Annual Research Report   Final Research Report ( PDF )
  • 2009 Annual Research Report
  • 2008 Annual Research Report
  • Research Products

    (14 results)

All 2010 2009 2008 Other

All Journal Article (2 results) (of which Peer Reviewed: 1 results) Presentation (11 results) Remarks (1 results)

  • [Journal Article] E391a collaboration, "Performance of particle identification by an upgraded back-anti counter in the KEK-E391a experiment."2010

    • Author(s)
      R. Ogata
    • Journal Title

      Nucl. Instr. And Methods A623

      Pages: 243-245

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] E391a collaboration, "Search for X (214) in KO (L)→pi0pi0X (X→mu+mu-."2009

    • Author(s)
      R. Ogata, et al.
    • Journal Title

      Pos KAON09

      Pages: 14-14

    • Related Report
      2010 Final Research Report
  • [Presentation] e391a共同実験,「KEK-PSE391a実験おけるKL0→π0π0vvの探索」2010

    • Author(s)
      緒方里咲, 他
    • Organizer
      日本物理学会2010年秋季大会
    • Year and Date
      2010-09-14
    • Related Report
      2010 Final Research Report
  • [Presentation] KEK-PS E391a実験おけるK_L^0→π^0π^0vvの探索2010

    • Author(s)
      緒方里咲, 他E391a collaboration
    • Organizer
      日本物理学会2010年秋季大会
    • Place of Presentation
      九州工業大
    • Year and Date
      2010-09-14
    • Related Report
      2010 Annual Research Report
  • [Presentation] e391a共同実験,「KEK-PSE391a実験おけるKL0→π0π0vvの探索」2010

    • Author(s)
      緒方里咲, 他
    • Organizer
      日本物理学会第65回年次大会
    • Year and Date
      2010-03-23
    • Related Report
      2010 Final Research Report
  • [Presentation] KEK-PS・E391a実験におけるKOL→πOπOννの探索2010

    • Author(s)
      緒方里咲, 他 E391a Collaboration
    • Organizer
      日本物理学会 第65回年次大会
    • Place of Presentation
      岡山大学
    • Year and Date
      2010-03-23
    • Related Report
      2009 Annual Research Report
  • [Presentation] e391a共同実験,「KEK-PSE391a実験おけるKL→π0π0X (X→μ+μ-)の探索」2009

    • Author(s)
      緒方里咲, 他
    • Organizer
      日本物理学会第64回年次大会
    • Year and Date
      2009-03-27
    • Related Report
      2010 Final Research Report
  • [Presentation] KEK-PS・E391a実験におけるK_L→π^0π^0X(X→μ^+μ^-)の探索2009

    • Author(s)
      緒方里咲, 他E391a collaboration
    • Organizer
      日本物理学会 第64回年次大会
    • Place of Presentation
      立教大学
    • Year and Date
      2009-03-27
    • Related Report
      2008 Annual Research Report
  • [Presentation] E391a collaboration, "Upgraded back anti counter for E391a using PWO crystal"2009

    • Author(s)
      緒方里咲
    • Organizer
      Technology and Instrumentation in Particle Physics 2009 (TIPP09)
    • Year and Date
      2009-03-14
    • Related Report
      2010 Final Research Report
  • [Presentation] E391a collaboration, "Search for X(214) in KL→π0π0X (X→μ+μ-) using back anti counter at the E391a experiment"2009

    • Author(s)
      緒方里咲
    • Organizer
      2009 KAON Int. Conf. (poster session)
    • Related Report
      2010 Final Research Report
  • [Presentation] Search for X(214)in KL→π^0π^0X(X→μ^+μ^-)using Back-Anti counter at the E391a experiment2009

    • Author(s)
      Risa Ogata for the E391a collaboration
    • Organizer
      2009 Kaon International Conference
    • Place of Presentation
      エポカルつくば(つくば市)
    • Related Report
      2009 Annual Research Report
  • [Presentation] E391a実験におけるK_L→π^0π^0X(X→μ^+μ^-)の探索2008

    • Author(s)
      緒方里咲, 他E391a collaboration
    • Organizer
      日本物理学会 2008年秋季大会
    • Place of Presentation
      山形大学
    • Year and Date
      2008-10-21
    • Related Report
      2008 Annual Research Report
  • [Presentation] e391a共同実験,「E391a実験おけるKLO→pi0pi0X(X→mumu)の探索」2008

    • Author(s)
      緒方里咲, 他
    • Organizer
      日本物理学会2008年秋季大会
    • Year and Date
      2008-09-21
    • Related Report
      2010 Final Research Report
  • [Remarks] ホームページ等

    • Related Report
      2010 Final Research Report

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Published: 2008-04-01   Modified: 2016-04-21  

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