Flavour Symmetry and Clean Strategies to Extract $γ$

One of the key elements in the testing of the Standard-Model description of CP violation through $B$-meson decays is the direct determination of the angle $γ$ of the unitarity triangle in a variety of ways. We give a brief overview of the implications of the current $B$-factory data for flavour-symmetry strategies, and discuss new, theoretically clean methods employing pure tree decays of neutral $B_{d,s}$ mesons.

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