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
【24h】
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
展开▼
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
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.
展开▼