Extracting |V_{ub}| from the inclusive charmless semileptonic branching ratio of b hadrons

Details Extracting |V_{ub}| from the inclusive charmless semileptonic branching ratio of b hadrons Extracting |V_{ub}| from the inclusive charmless semileptonic branching ratio of b hadrons

1998-10-21

arxiv.org/abs/hep-ph/9810427v2

Phys.Lett.B448:119-124,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 3 ps figures, revised version to appear in PLB, minor changes in the numerical results

Scientific paper

10.1016/S0370-2693(99)00034-9

We calculate the inclusive charmless semileptonic decay width of the B meson using a QCD-based approach. This approach is able to account for both dynamic and kinematic effects of nonperturbative QCD. The charmless semileptonic decay width is found to be enhanced by long-distance strong interactions by +(7\pm 5)% with respect to the free quark decay width. Using the resulting theoretical value for the charmless semileptonic decay width, an extraction of $|V_{ub}|$ is made from the measured lifetime and inclusive charmless semileptonic branching ratio of b hadrons.

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