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.
Auteur principal
Bastian Kronenbitter
(EKP, Karlsruhe Institue of Technology)
