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Particles and Fields


Eur. Phys. J. C 21, 495-499 (2001)
DOI: 10.1007/s100520100725

Determination of the CP-violating weak phase $\gamma$ from the decays $B \to D \pi$

C.S. Kim and Sechul Oh

Department of Physics and IPAP, Yonsei University, Seoul, 120-749, Korea

(Received: 17 April 2001 / Revised version: 1 June 2001 / Published online: 17 August 2001 -© Springer-Verlag / Società Italiana di Fisica 2001 )

Abstract
We propose a new method to extract the CP-violating weak phase $\gamma$ (the phase of Vub*) 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 the f's are final states such as $K^+ \pi^-$, $K^+
\rho^-$, $K \pi\pi$, etc. We also study the experimental feasibility of our new method. With the 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.



© Società Italiana di Fisica, Springer-Verlag 2001