$\rho$ Polarization and `Model Independent' Extraction of $|V_{ub}|/|V_{cd}|$ from $D\to \rho \ell \nu$ and $B\to \rho \ell \nu$

Abstract

We briefly discuss the predictions of the heavy quark effective theory for the semileptonic decays of a heavy pseudoscalar to a light one, or to a light vector meson. We point out that measurement of combinations of differential helicity decay rates at Cleo-c and the $B$ factories can provide a model independent means of extracting the ratio $|V_{ub}|/|V_{cd}|$. We briefly discuss the corrections to this prediction.

8 pages, LaTeX, 1 figure

References in corpus (4)

• Semileptonic Meson Decays in the Quark Model: An Update
• Critical Analysis of Theoretical Estimates for $B$ to Light Meson Form Factors and the $B\to \psi K(K^{\ast })$ Data
• 1/m_Q Corrections to the Heavy-to-Light-Vector Transitions in the HQET
• Application of HQET to $B\to K^{(\ast )}$ Transitions