Theoretical Uncertainties in Gamma_sl(b->u)

Details Theoretical Uncertainties in Gamma_sl(b->u) Theoretical Uncertainties in Gamma_sl(b->u)

1999-05-27

arxiv.org/abs/hep-ph/9905520v3

Int.J.Mod.Phys. A14 (1999) 4641-4652

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, LaTeX; discussion of 1/m_b^3 effects is expanded. Contribution to Workshop on the Derivation of |V_cb| and |V_ub|: E

Scientific paper

10.1142/S0217751X99002177

I review the existing theoretical uncertainties in relating the semileptonic
decay width in b->u transitions to the underlying Kobayashi-Maskawa mixing
element |V_ub|. The theoretical error bars are only a few percent in |V_ub|,
with uncertainties from the impact of the nonperturbative effects nearly
negligible.

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