Meaurement of CP content and time-dependent CP violation in B<super>0</super> &rarr; D<super>*+</super>D<super>*-</super> decays

Abstract

This dissertation presents the measurement of the the CP-odd fraction and time-dependent CP violation parameters for the B0 → D+D- decay. These results are based on the full BaBar dataset of (467 ± 5) × 106 BB pairs collected at the PEP-II B factory at the Stanford Linear Accelerator Center. An angular analysis finds that the CP-odd fraction of the B0 → D+D- decay is R⊥ = 0.158 ± 0.028 ± 0.006, where the first uncertainty is statistical, and the second is systematic. A fit to the flavor-tagged, time-dependent, angular decay rate yields C+ = 0.02 ± 0.12 ± 0.02 C⊥ = 0.41 ± 0.50 ± 0.08 S+ = -0.76 ± 0.16 ± 0.04 S⊥ = -1.81 ± 0.71 ± 0.16, for the CP-odd (⊥) and CP-even (+) contributions. Constraining these two contributions to be the same results in C = 0.047 ± 0.091 ± 0.019 S = -0.71 $plusmn; 0.16 ± 0.03. These measurements are consistent with the Standard Model and with measurements of sin2β from B0 → (cc)K0 decays.