Browsing by Author "Lae, Chung Khim"
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Item A Simultaneous Measurement of the Branching Fractions of Ten B to Double Charm Decays(2006-06-28) Lae, Chung Khim; Roberts, Douglas A; Physics; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)This dissertation presents a simultaneous measurement of the branching fractions of ten B → D(*)D̅(*) decays. The measurements are derived from a sample of 2.32 × 108 BB̅ pairs collected by the BABAR detector at the PEP-ⅡB Factory located at Stanford Linear Accelerator Center. The branching fractions (×10−4) are: −0.10 ± 0.47 ± 0.15 (< 0.59) for B0 → D0D̅0
1.01 ± 1.11 ± 0.35 (< 2.92) for B0 → D*0D̅0
−1.31 ± 1.10 ± 0.38 (< 0.92) for B0 → D*0D̅*0
2.81 ± 0.44 ± 0.45 for B0 → D+D−
5.72 ± 0.65 ± 0.71 for B0 → D*+D−
8.11 ± 0.57 ± 0.98 for B0 → D*+D*−
3.76 ± 0.59 ± 0.45 for B− → D−D0
3.56 ± 0.54 ± 0.40 for B− → D*−D0
6.30 ± 1.35 ± 0.95 for B− → D−D*0
8.14 ± 1.20 ± 1.16 for B− → D*−D*0
The first uncertainty is statistical while the second is systematic. The number in parentheses is the 90% upper limit using the Feldman-Cousins method with systematic uncertainties taken into account. These measurements are consistent with the Standard Model predictions using the factorization assumption.