Orateur
Bastian Kronenbitter
(EKP, Karlsruhe Institue of Technology)
Description
In this talk, the measurement of the branching fraction, polarization, and time-dependent CP-violation in $B^0 \to D^{*+} D^{*-}$ decays will be presented. It was performed with a data sample of 772 million $B \bar{B}$ pairs, collected with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider.
The time-dependent CP-violation in this $b \to c \bar{c} d$ transition is directly related to $\phi_1$, one of the angles of the CKM triangle. Depending on the relative angular momentum of the two $D^*$ mesons, both CP-even and CP-odd final states occur. For their statistical separation, an angular analysis was performed, using two of three angles of the transversity base.
Author
Bastian Kronenbitter
(EKP, Karlsruhe Institue of Technology)
