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Study of exclusive charmless semileptonic<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi></mml:math>decays and extraction of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mo stretchy="false">|</mml:mo><mml:msub><mml:mi>V</mml:mi><mml:mrow><mml:mi>u</mml:mi><mml:mi>b</mml:mi></mml:mrow></mml:msub><mml:mo stretchy="false">|</mml:mo></mml:math>at CLEO
We have studied semileptonic $B$ decay to the exclusive charmless states $\ensuremath{\pi}$, $\ensuremath{\rho}/\ensuremath{\omega}$, $\ensuremath{\eta}$ and ${\ensuremath{\eta}}^{\ensuremath{'}}$ using the full $15.5\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ CLEO $\ensuremath{\Upsilon}(4S)$ sample, with measurements performed in subregions of phase space to minimize dependence on a priori knowledge of the form factors involved. We find total branching fractions …