Phenomenology of Vub from Ratios of Inclusive B Decay Rates
Abstract
We explore the theoretical feasibility of extracting Vub from two ratios built from B meson inclusive partial decays, R1 = Gamma(b-> u cbar s)/3Gamma(b -> c l nu), and R2 = [Gamma(b -> c X) - Gamma(b -> cbar X)]/Gamma(b -> c ubar d). We discuss contributions to these quantities from perturbative and nonperturbative physics, and show that they can be computed with overall uncertainties at the level of 10%.
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