Study of D0- D̄0 mixing and D0 doubly Cabibbo-suppressed decays
Using a sample of four million hadronic Z events collected in ALEPH from 1991 to 1995, the decays D∗+→D0πs+, with D0 decaying to K−π+ or to K+π−, are studied. The relative branching ratio B(D0→K+π−)/B(D0→K−π+) is measured to be 1.84±0.59(stat.) ±0.34(syst.)%. The two possible contributions to the D0...
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| Main Authors: | , |
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| 格式: | text |
| 語言: | English |
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Institutional Knowledge at Singapore Management University
1998
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| 在線閱讀: | https://ink.library.smu.edu.sg/sis_research/5839 |
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| 總結: | Using a sample of four million hadronic Z events collected in ALEPH from 1991 to 1995, the decays D∗+→D0πs+, with D0 decaying to K−π+ or to K+π−, are studied. The relative branching ratio B(D0→K+π−)/B(D0→K−π+) is measured to be 1.84±0.59(stat.) ±0.34(syst.)%. The two possible contributions to the D0→K+π− decay, doubly Cabibbo-suppressed decays and D0–D̄0 mixing, are disentangled by measuring the proper-time distribution of the reconstructed D0's. Assuming no interference between the two processes, the upper limit obtained on the mixing rate is 0.92% at95%CL. The possible effect of interference between the two amplitudes is also assessed. |
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