首页> 外文学位 >Measurement of the relative amplitude and strong phase between antineutral D meson decaying to kaon+ resonance kaon- and neutral D meson decaying to kaon+ resonance kaon- via Dalitz plot analysis of neutral D meson decaying to kaon+ kaon- neutral pion dec
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Measurement of the relative amplitude and strong phase between antineutral D meson decaying to kaon+ resonance kaon- and neutral D meson decaying to kaon+ resonance kaon- via Dalitz plot analysis of neutral D meson decaying to kaon+ kaon- neutral pion dec

机译:通过中性 D 介子衰减到 kaon+ 共振 kaon- 和中性 D 介子衰减到 kaon+ 共振 kaon- 之间的相对振幅和强相位的测量中性 D 介子衰减到 kaon+ 共振 kaon- 通过中性 D 介子衰减到 kaon+ kaon- 中性 π dec 的 Dalitz 图 分析

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摘要

I present physics concepts, which are useful to understand our analyses, and describe the CLEO III and CLEO-c experiments at the Cornell Electron Storage Ring. I also present motivations for a Dalitz plot analysis of the Cabibbo-suppressed charmed meson decay mode D0 → K+K?π 0 at CLEO. The analysis uses 9.0 fb?1 of data collected at [special characters omitted] ≈ 10.58 GeV with the CLEO III detector. We find the strong phase difference δD ≡ [special characters omitted] = 332° ± 8° ± 11° and relative amplitude rD ≡ [special characters omitted] = 0.52 ± 0.05 ± 0.04. This measurement indicates significant destructive interference between D0 → K+(K?π 0)K*? and D0 → K? (K+π0) K*+ in the D 0 → K+ K?π0 Dalitz plot region where these two modes overlap. The fit includes the K*± and &phis; resonances and a non-resonant amplitude, and the measured fit fractions for each resonance (with statistical uncertainty only) are (46.1 ± 3.1)% for the K*+, (12.3 ± 2.2)% for the K*?, (14.9 ± 1.6)% for the &phis;, and (36.0 ± 3.7)% for the non-resonant contribution. We find δD = 313° ± 9° (stat.) and an amplitude ratio of rD = 0.52 ± 0.05 (stat.) from a second fit which substitutes scalar κ± (mass 878 MeV/c2, width 499 MeV/c2) amplitudes for the non-resonant amplitude. The measured fit fractions for each resonance (with statistical uncertainty only) are (48.1 ± 4.5)% for the K*+, (12.9 ± 2.6)% for the K*?, (16.1 ± 1.9)% for the &phis;, (12.6 ± 5.8)% for the κ+, and (11.1 ± 4.7)% for the κ?. We also investigate the D 0 → K+K ?π0 Dalitz plot in 281 pb?1 of data collected at [special characters omitted] ≈ 3.77 GeV with the CLEO-c detector. We find results which are consistent with the CLEO III analysis. I conclude by summarizing our results and present a brief appendix detailing the K-matrix formalism.
机译:我介绍了物理概念,这些概念有助于理解我们的分析,并描述了康奈尔电子存储环的 CLEO III 和 CLEO-c 实验。我还提出了 CLEO 的 Cabibbo 抑制魅力介子衰变模式 D0 → K+K?π 0 的 Dalitz 图分析的动机。该分析使用 CLEO III 检测器在 [省略特殊字符] ≈ 10.58 GeV 处收集的数据的 9.0 fb?1 数据。我们发现强相位差 δD ≡ [省略特殊字符] = 332° ± 8° ± 11°,相对幅度 rD ≡ [省略特殊字符] = 0.52 ± 0.05 ± 0.04。该测量表明 D0 → K+(K?π 0)K*?和 D0 → K?(K+π0)D、0 → K+ K?π0 达利茨图区域中的 K*+,其中这两种模式重叠。拟合包括 K*± 和 &phis; 谐振以及非谐振幅度,每个谐振的测得拟合分数(仅统计不确定性)为 (46.1 ± 3.1)% 对于 K*+,(12.3 ± 2.2)% 对于 K*?,(14.9 ± 1.6)% 对于&phis;,以及 (36.0 ± 3.7)% 对于非谐振贡献。我们发现 δD = 313° ± 9°(统计),振幅比为 rD = 0.52 ± 0.05(统计),第二次拟合用标量 κ±(质量 878 MeV/c2,宽度 499 MeV/c2)振幅代替非谐振振幅。每个共振的测量拟合分数(仅具有统计不确定性)为 K*+ 的 (48.1 ± 4.5)%)%,K*± 的 (12.9 2.6)%),&phis; 的 (16.1 ± 1.9)%),κ+ 的 (12.6 ± 5.8)% 和 κ?的 (11.1 ± 4.7)%。我们还研究了使用 CLEO-c 检测器在 [省略特殊字符] ≈ 3.77 GeV 处收集的 281 pb?1 数据中的 D 0 → K+K ?π0 达利茨图。我们发现的结果与 CLEO III 分析一致。最后,我总结了我们的结果,并提供了一个简短的附录,详细介绍了 K 矩阵形式。

著录项

  • 作者

    Naik, Paras P.;

  • 作者单位

    University of Illinois at Urbana-Champaign;

  • 授予单位 University of Illinois at Urbana-Champaign;
  • 学科 Particle physics
  • 学位
  • 年度 2006
  • 页码 156
  • 总页数 156
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Particle physics;

    机译:粒子物理学;
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