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The differential decay width of the process $\bar{B} \rightarrow \rho l\bar{\nu}$ is related to that of the process $\bar{B} \rightarrow K^* l \lbar$by using $SU(3)$-flavor symmetry and the heavy quark symmetry. The ratio of theKobayashi-Maskawa matrix elements is obtained in the zero recoil limit of$\rho$ and $K^*$, allowing a determination of $|V_{ub}|$.Comment: Latex file 9 pag

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New Method for Determining<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>V</mml:mi></mml:mrow><mml:mrow><mml:mi>ub</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mi>/</mml:mi><mml:mrow><mml:msub><mml:mrow><mml:mi>V</mml:mi></mml:mrow><mml:mrow><mml:mi>ts</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>by the Processes<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mrow><mml:mover><mml:…

New Method for DeterminingVub/Vtsby the Processes