Charm decays and D0-D̄0 mixing

✍ Scribed by M Aleppo

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 384 KB
• Volume: 675
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(00)00268-2

✦ Synopsis

The LEP1 data sample (4 million hadronic Z decays) recorded by the ALEPH detector is analysed to study charmed particle decays. The measurements of the hadronic branching ratios D O -+ K-~r+, and of the purely leptonic decays D~ --* ~-u and Ds --+ #u are presented. The L=I charmed mesons D** and D** are reconstructed in several exclusive decay channels and their production rates are measured. The contributions from charm quark fragmentation and from b hadron decays are disentangled. A study of decays D *+ --+ D%r +, with D O decaying D o --* K-~r + and D O --+ K%r-is shown. The relative branching ratio B(D ° --~ K%r-)/B(D ° --~ K-r +) is measured and the contribution to D o --+ K%r-decay given by D°-I) ° mixing is extracted with a study of D o proper time distribution.