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

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

1996-05-02

arxiv.org/abs/hep-ph/9605201v2

Phys.Lett. B414 (1997) 347-353

Physics

High Energy Physics

High Energy Physics - Phenomenology

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

Scientific paper

10.1016/S0370-2693(97)01203-3

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.

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