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Study of the branching ratio of B → ρρ decays at the Belle experiment
http://hdl.handle.net/2241/6346
http://hdl.handle.net/2241/6346878b18c6-657c-4249-b1cd-5580bc4d290f
Item type | Thesis or Dissertation(1) | |||||
---|---|---|---|---|---|---|
公開日 | 2007-07-25 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Study of the branching ratio of B → ρρ decays at the Belle experiment | |||||
言語 | ||||||
言語 | jpn | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_db06 | |||||
タイプ | doctoral thesis | |||||
アクセス権 | ||||||
アクセス権 | open access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||
著者 |
張, 景芝
× 張, 景芝 |
|||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | In this dissertation, we report the first observation of the charmless vector-vector decay mode B+[?]ρ+ρ0. The measurement is based on a 78fb-1 data sample collected with the Belle detector at the KBKB asymmetric e+e- colider operating at the Υ(4S) resonance. We obtain the branching fraction of B(B+[?]ρ+ρ0)=(31.7[?]7.1(stat.)[?]3.9(sys.)[?](pol.))X10-6. From an analysis of the ρ helicity-angle deistributions, we obtain a longitudinal polarization ratio, ΓL/Γ=(94.8[?]10.6(stat.)[?]2.1(sys.))%. We also measure a partial rate asymmetry Acp(B[?][?]ρ[?]ρ0)=(0.1[?]22.4(stat.)[?](sys.))%. | |||||
言語 | en | |||||
内容記述 | ||||||
内容記述タイプ | Other | |||||
内容記述 | Includes bibliographical references | |||||
言語 | en | |||||
書誌情報 |
発行日 2003 |
|||||
取得学位 | ||||||
学位名 | 博士(工学) | |||||
取得学位 | ||||||
学位名 | Doctor of Philosophy in Engineering | |||||
学位授与大学 | ||||||
学位授与機関識別子Scheme | kakenhi | |||||
学位授与機関識別子 | 12102 | |||||
言語 | ja | |||||
学位授与機関名 | 筑波大学 | |||||
言語 | en | |||||
学位授与機関名 | University of Tsukuba | |||||
学位授与年度 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 2002 | |||||
学位授与年月日 | ||||||
学位授与年月日 | 2003-03-25 | |||||
報告番号 | ||||||
学位授与番号 | 甲第3141号 |