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Search for neutral B meson decays to eta' eta' Ks and study of CP violation

Research Project

Project/Area Number 18740149
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionUniversity of Tsukuba

Principal Investigator

MIYAKE Hideki  University of Tsukuba, 大学院・数理物質科学研究科, 研究員 (20403115)

Project Period (FY) 2006 – 2008
Project Status Completed (Fiscal Year 2008)
Budget Amount *help
¥3,770,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥270,000)
Fiscal Year 2008: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2007: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2006: ¥2,000,000 (Direct Cost: ¥2,000,000)
KeywordsB中間子 / CP対称性の破れ / b→sqqペンギン振幅 / b→sペンギン振幅
Research Abstract

B中間子のb→sqq遷移モードの一つであるB0→η'η'KS崩壊を研究し、人工ニューラルネットワークを用いた多変量解析を導入する事でシグナルを残したまま膨大な背景事象を効率良く排除する手法を確立した。
また同じくb→sqq遷移モードの一つであるB0→f0(980)(→π+π-)KS崩壊のCP非対称度パラメータを、当時の世界最高精度で測定すると共にモンテカルロシミュレータを改良し干渉効果の定量的な見積もりを行った。

Report

(4 results)
  • 2008 Annual Research Report   Final Research Report ( PDF )
  • 2007 Annual Research Report
  • 2006 Annual Research Report
  • Research Products

    (4 results)

All 2007

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

  • [Journal Article] Measurements of time-dependent CP violation in B^0→ωK_S^0, f_0(980)K_S^0, K_S^0π^0 and K^+K^-K_S^0 decays2007

    • Author(s)
      K. Abe, H. Miyake et al.
    • Journal Title

      Physical Review D 76巻

      Pages: 91103-91112

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Measurements of time-dependent CP violation in B^0→ωK_s^0, f_0(980)K_s^0, K_s^0π^0 and K^+K^-K_s^0 decays2007

    • Author(s)
      K.Abe, H.Miyake, et. al.(The Belle Collaboration)
    • Journal Title

      Physical Review D 76

      Pages: 91103-91112

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Presentation] Studies of penguin dominated B decays2007

    • Author(s)
      Y. Yusa
    • Organizer
      SUSY07
    • Place of Presentation
      Karlsruhe, Germany
    • Year and Date
      2007-07-27
    • Related Report
      2008 Final Research Report 2007 Annual Research Report
  • [Presentation] phi1 and b->sqq TCPV2007

    • Author(s)
      K. Sumisawa
    • Organizer
      21^<st> International workshop on Weak Interaction s and Neutrinos (WIN07)
    • Place of Presentation
      Kolkata, India
    • Year and Date
      2007-01-17
    • Related Report
      2008 Final Research Report

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Published: 2006-04-01   Modified: 2016-04-21  

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