Determination of |V_ub| (DGE) for the P⁺ analyses

The same m_b value used for the fit over all the independent analyses is used

|Vub| (DGE) for the P+ analyses
Experiment	Value [10-3]	Parameters	References	Remarks
BELLE P^{+}	3.75 +/- 0.32 +/- 0.32	input	Phys.Rev.Lett.95:241801,2005 (hep-ex/0505088)	P, BRECO tag
BABAR P^{+}	3.99 +/- 0.25 +/- 0.34	input	[arXiv:0708.3702v1]	P, BRECO tag
Average +/- exp +/- (mb,theory)	3.89 +/- 0.25 +/- 0.33	chi2/dof = 0.33/1 (CL = 0.57)	Plots: eps pdf gif	mb from the PDG07 average

The full breakdown of the uncertainties on the average |Vub| above is (all errors quoted in percent):

+-3.6_stat +-2.9_exp +-1.8_{b2c model} +-2.3_{b2u model} +-1.1_{alpha_s R_CUT} +-7.2_{mb R_CUT} +-3.0 _{TOTAL SL WIDTH} +-1.6 _WA +-2.3_{DGE theory}

where the errors correspond to the statistics (stat), the experimental systematics (exp), the modeling of b -> c l nu and b -> u l nu decays (b2c model and b2u model, respectively), the effect of the alpha_s uncertainty on R_CUT (alpha_s R_CUT), the effect of the uncertainty on m_b on the prediction of the event fraction (mb R_CUT), the uncertainty on the total semileptonic B width (TOTAL SL WIDTH), the Weak Annihilation (WA) and from the change
and the variation of the scale of the matching scheme (DGE theory).