Hadronic B Decays to Open Charm at the BaBar Experiment

Using about 23M B{bar B} events collected in 1999-2000 with the BABAR detector, they report on the decays B {yields} D(*){bar D}(*)K and B{sup 0} {yields} D*{sup +}D*{sup -}. The branching fractions of the low background decay modes B{sup 0} {yields} D*{sup -} D(*){sup 0}K{sup +} are determined to be {Beta}(B{sup 0} {yields} D*{sup -} D{sup 0}K{sup +}) = (2.8 {+-} 0.7 {+-} 0.5) x 10{sup -3} and {Beta}(B{sup 0} {yields} D*{sup -}D*{sup 0}K{sup +}) = (6.8 {+-} 1.7 {+-} 1.7) x 10{sup -3}, where the first error quoted is statistical and the second systematic. Observation of a significant number of candidates in the color-suppressed decay mode B{sup +} {yields} D*{sup +}D*{sup -} K{sup +} is reported with a branching fraction {Beta}(B{sup +} {yields} D*{sup +}D*{sup -} K{sup +}) = (3.4 {+-} 1.6 {+-} 0.9) x 10{sup -3}. Decays of the type B {yields} D(*){bar D}(*) can be used to provide a measurement of the parameter sin2{beta} of the Unitarity Triangle. For this decay mode they measure a branching fraction of {Beta}(B{sup 0} {yields} D*{sup +}D*{sup -}) = (8.0 {+-} 1.6 {+-} 1.2) x 10{sup -4}.