Phenomenology of [formula presented] from ratios of inclusive B decay rates
We explore the theoretical feasibility of extracting V{sub ub} from two ratios built from B meson inclusive partial decays, R{sub 1}={gamma}(b{yields}uc(bar sign)s{sup '})/3{gamma}(b{yields}cl{nu}(bar sign)) and R{sub 2}=[{gamma}(b{yields}cX)-{gamma}(b{yields}c(bar sign)X)]/{gamma}(b{yields}cu(bar sign)d{sup '}). 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%. (c) 2000 The American Physical Society.