Extraction of a Weak Phase from $B\to D^{(\ast )}\pi$

Denis Suprun, Cheng-Wei Chiang, Jonathan L. Rosner

To observe CP-violating asymmetries through the interference of a weaker amplitude with a stronger one in $\bo \to D^{(*)} π$ and $\ob \to D^{(*)} π$ decays, one must collect enoug…