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 B<super>0<super> &rarr; D<super>*+</super>D<super>*-</super> decay. These results are based on the full BaBar dataset of (467 &plusmn; 5) &times; 10<super>6</super> 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 B<super>0<super> &rarr; D<super>*+</super>D<super>*-</super> decay is R_&perp; = 0.158 &plusmn; 0.028 &plusmn; 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<br>

C₊ = 0.02 &plusmn; 0.12 &plusmn; 0.02 <br>

C_&perp; = 0.41 &plusmn; 0.50 &plusmn; 0.08 <br>

S₊ = -0.76 &plusmn; 0.16 &plusmn; 0.04 <br>

S_&perp; = -1.81 &plusmn; 0.71 &plusmn; 0.16,<br>

for the CP-odd (&perp;) and CP-even (+) contributions. Constraining these two contributions to be the same results in<br>

C = 0.047 &plusmn; 0.091 &plusmn; 0.019 <br>

S = -0.71 $plusmn; 0.16 &plusmn; 0.03.<br>

These measurements are consistent with the Standard Model and with measurements of sin2&beta; from B<super>0</super> &rarr; (cc)K<super>0</super> decays.