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EnglishUsing a sample of four million hadronic Z events collected in ALEPH from 1991 to 1995, the decays D8+ --> D(0)pi(s)(+), with D-0 decaying to K- pi(+) or to K+ pi(-), are studied. The relative branching ratio B(D-0 --> K+ pi(-))/B(D-0 --> K- pi(+)) is measured to be (1.84 +/- 0.59(stat.) +/- 0.34(syst.))%. The two possible contributions to the D-0 --> K+ pi(-) decay, doubly Cabibbo-suppressed decays and DO-DO mixing, are disentangled by measuring the proper-time distribution of the reconstructed DO's. Assuming no interference between the two processes, the upper limit obtained on the mixing rate is 0.92% at 95% CL. The possible effect of interference between the two amplitudes is also assessed. (C) 1998 Elsevier Science B.V. All rights reserved. RI Jones, Roger/H-5578-2011; Passalacqua, Luca/F-5127-2011; Murtas, Fabrizio/B-5729-2012; O'Shea, Val/G-1279-2010; Ferrante, Isidoro/F-1017-2012; Sanchez, Federico/F-5809-2012
http://hdl.handle.net/20.500.11769/12116| Titolo: | Study of D-0-(D)over-bar(0) mixing and D-0 doubly Cabibbo-suppressed decays |
| Autori interni: | TRICOMI, Alessia Rita |
| Data di pubblicazione: | 1998 |
| Rivista: | PHYSICS LETTERS. SECTION B |
| Abstract: | Using a sample of four million hadronic Z events collected in ALEPH from 1991 to 1995, the decays D8+ --> D(0)pi(s)(+), with D-0 decaying to K- pi(+) or to K+ pi(-), are studied. The relative branching ratio B(D-0 --> K+ pi(-))/B(D-0 --> K- pi(+)) is measured to be (1.84 +/- 0.59(stat.) +/- 0.34(syst.))%. The two possible contributions to the D-0 --> K+ pi(-) decay, doubly Cabibbo-suppressed decays and DO-DO mixing, are disentangled by measuring the proper-time distribution of the reconstructed DO's. Assuming no interference between the two processes, the upper limit obtained on the mixing rate is 0.92% at 95% CL. The possible effect of interference between the two amplitudes is also assessed. (C) 1998 Elsevier Science B.V. All rights reserved. RI Jones, Roger/H-5578-2011; Passalacqua, Luca/F-5127-2011; Murtas, Fabrizio/B-5729-2012; O'Shea, Val/G-1279-2010; Ferrante, Isidoro/F-1017-2012; Sanchez, Federico/F-5809-2012 |
| Handle: | http://hdl.handle.net/20.500.11769/12116 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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