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Languages : en
Pages : 17
Book Description
The author reports on a Dalitz plot analysis of B− → D+?−?− decays, based on a sample of about 383 million ?(4S) → B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. They find the total branching fraction of the three-body decay: ?(B− → D+ ?−?−) = (1.08 ± 0.01 ± 0.05) x 10−3. the masses and widths of D*2° and D*0°, the 2+ and 0+ c{bar u} P-wave states decaying to D+?−, are measured: m{sub D*2°} = (2460.4 ± 1.2 ± 1.2 ± 1.9) MeV/c2, ?{sub D*2°} = (41.8 ± 2.5 ± 2.1 ± 2.0) MeV, m{sub D*0°} = (2297 ± 8 ± 5 ± 19) MeV/c2 and ?{sub D*0°} = (273 ± 12 ± 17 ± 45) MeV. The stated errors reflect the statistical and systematic uncertainties, and the uncertainty related to the assumed composition of signal events and the theoretical model.
