Abstract
Using the ARGUS detector at the e+e- storage ring DORIS II at DESY, we have studied the decay B0 → D*+ ℓ- v by exploiting a partial D*+ reconstruction technique. The branching ratio for this mode was thereby determined to be (4.5 ± 0.3 ± 0.4)%. Using the corresponding sample of tagged B0 mesons, we measured the B0B0 mixing parameter to be rd = 0.194 ± 0.062 ± 0.054, a result only weakly dependent upon the ratio of semileptonic widths for and production rates of B0 and B+ mesons. We have also determined the branching ratio Br (B0 → X ℓ-v to be (9.3 ± 1.1 ± 1.5)%. By comparing the results for full and partial D*+ reconstuction we found the absolute branching ratios for D0 → K-π+ and D0 → K- π+π+π- to be (4.5 ± 0.6 ± 0.4)% and (7.9 ± 1.5 ± 0.9)%, respectively.
Original language | English |
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Pages (from-to) | 249-254 |
Number of pages | 6 |
Journal | Physics Letters B |
Volume | 324 |
Issue number | 2 |
DOIs | |
State | Published - 31 Mar 1994 |
Externally published | Yes |