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We present an isospin analysis of the decay modes B\to D\bar{D}, D^*\bar{D},D\bar{D}^* and D^*\bar{D}^*, which allows determination of the final-stateinteraction phases. As these transitions have branching ratios of the order10^{-4} or larger, they could be useful in detecting the CP- violating phase\phi_1 \equiv \arg (-V^*_{cb} V_{cd} V_{tb} V^*_{td} ) in the first-roundexperiments of a B-meson factory. The problem of penguin pollution may still bepresent. Once the Kobayashi-Maskawa matrix elements are known, it is possibleto obtain the magnitudes and relative phases of hadronic matrix elements forB\to D^{(*)}\bar{D}^{(*)}. This will in turn lead to some information about thepenguin pollution.Comment: Latex 14 pages. This was indeed the submission version, which is  slightly different from the original hep-ph version. Accepted for publication  in Phys. Rev.

physical review. d. particles, fields, gravitation, and cosmology/physical review. d. particles and fields

Towards determining<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>φ</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>with<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi><mml:mo>→</mml:mo><mml:mrow><mml:msup><mml:mrow><mml:mi>D</mml:mi></mml:mrow><mml:mrow><mml:mo>(</mml:mo><mml:mi>*</mml:mi><mml:mo>)</mml:mo></mml:mrow></mml:msup></mml:mrow><mml:…

Towards determiningφ1withB→D(*)