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Determination of the CP Phase Ξ³\gamma with Possibility of New Physics

Abstract

We propose a new method to extract the CP violating weak phase Ξ³\gamma in the CKM paradigm of the Standard Model, using Bβˆ’β†’D0Ο€βˆ’β†’fΟ€βˆ’B^- \to D^0 \pi^- \to f \pi^- and Bβˆ’β†’DΛ‰0Ο€βˆ’β†’fΟ€βˆ’B^- \to \bar D^0 \pi^- \to f \pi^- decays, where ff are final states such as K+Ο€βˆ’K^+ \pi^-, K+Οβˆ’K^+ \rho^-, KππK \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 Ξ³\gamma, and find that it would be in principle possible to identify Ξ³\gamma and a new phase angle ΞΈ\theta separately.Comment: 4 pages, LaTeX; Using two-column style file (ltwol.sty); To be published in the Proceedings of the Fourth International Workshop on B Physics and CP Violation, Ise-Shima, Japan, February 18 - 23, 200

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