Determination of the angle gamma using B -> D* V modes

Details Determination of the angle gamma using B -> D* V modes Determination of the angle gamma using B -> D* V modes

1997-12-23

arxiv.org/abs/hep-ph/9712502v1

Phys.Rev.Lett.80:3706-3709,1998

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 Pages Revtex

Scientific paper

10.1103/PhysRevLett.80.3706

We propose a method to determine the angle $\gamma=arg(V_{ub})$, using the $B\to D^*V$ ($V=K^*, \rho$) modes. The $D^*$ is considered to decay to $D \pi$. An interference of the $B \to D^{*0}V$ and $B \to \bar {D^{*0}}V$ amplitudes is achieved by looking at a common final state $f$, in the subsequent decays of $D^0/\bar{D^0}$. A detailed analysis of the angular distribution, allows determination, not only of $\gamma$ and $|V_{ub}|$, but also all the hadronic amplitudes and strong phases involved. No prior knowledge of doubly Cabibbo suppressed branching ratios of $D$ are required. Large CP violating asymmetries ($\sim30 %$ for $\gamma=30^o$) are possible if $\bar{D^0} \to f$ is doubly Cabbibo suppressed, while $D^0 \to f$ is Cabbibo allowed, for decays of $B^+$ or $B^0$.

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