Determination of the CP violating weak phase $γ$ from the Decays $B \to D π$

Details Determination of the CP violating weak phase $γ$ from the Decays $B \to D π$ Determination of the CP violating weak phase $γ$ from the Decays $B \to D π$

2000-09-07

arxiv.org/abs/hep-ph/0009082v4

Eur.Phys.J.C21:495-499,2001

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 1 figure, LaTex; the version to be published in European Physical Journal C

Scientific paper

10.1007/s100520100725

We propose a new method to extract the CP violating weak phase $\gamma$ (the phase of $V_{ub}^*$) in the CKM paradigm of the Standard Model, using $B^- \rightarrow D^0 \pi^- \rightarrow f \pi^-$ and $B^- \rightarrow \bar D^0 \pi^- \rightarrow f \pi^-$ decays, where $f$ are final states such as $K^+ \pi^-$, $K^+ \rho^-$, $K \pi\pi$, {\it etc.} We also study the experimental feasibility of our new method. With possibility of new phases in the CKM matrix, we re-examine some of the previously proposed methods to determine $\gamma$, and find that it would be in principle possible to identify $\gamma$ and a new phase angle $\theta$ separately.

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