A New Model-independent Method of Determining |V_{ub}/V_{cb}|

Abstract

In order to determine the ratio of CKM matrix elements |V_{ub}/V_{cb}| (and |V_{ub}|), we propose a new model-independent method based on the heavy quark effective theory, which is theoretically described by the phase space factor and the well-known perturbative QCD correction only. In the forthcoming asymmetric B-experiments with microvertex detectors, BABAR and BELLE, the total separation of b --> u semileptonic decays from the dominant b --> c semileptonic decays would be experimentally viable. We explore the possible experimental option: the measurement of inclusive hadronic invariant mass distributions. We also clarify the relevant experimental backgrounds.

13 pages, no figures, ordinary LaTeX. Many improvements. To be published at Phys. Lett. B

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Cited by in corpus (3)

• Measuring |V_{td} / V_{ub}| through B -> M ν\barν(M=π,K,ρ,K^*) decays
• Determinations of |V_ub| and |V_cb| from measurements of B -> X_u,c\ellνdifferential decay rates
• Analysis of hadronic invariant mass spectrum in inclusive charmless semileptonic B decays