Precision Determination of $|V_{ub}|$

Details Precision Determination of $|V_{ub}|$ Precision Determination of $|V_{ub}|$

2006-12-07

arxiv.org/abs/hep-ph/0612077v2

Nucl.Phys.Proc.Suppl.170:94-101,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

Invited talk at International Conference on B-Physics at Hadron Machines (Beauty 2006), Oxford, England, 25-29 Sep 2006

Scientific paper

10.1016/j.nuclphysbps.2007.05.00

The last two years have seen an impressive improvement in the determination of $|V_{ub}|$, especially from inclusive decays. The error on $|V_{ub}|$ measured with inclusive decays was reduced from 18% (PDG 2004) to 8% (PDG 2006). This progress is a result of combined experimental and theoretical efforts. In this talk, the theoretical framework (BLNP) that enabled such progress is reviewed, as well as other approaches to an inclusive determination of $|V_{ub}|$ (DGE, $M_X-q^2$ etc.). The prospects of improving $|V_{ub}|$ are discussed, addressing issues of weak annihilation, implications of leptonic B decays, and determination of $|V_{ub}|$ with exclusive decays.

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