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

The same mb 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):

+-3.6stat +-2.9exp +-1.8b2c model +-2.3b2u model +-1.1alpha_s R_CUT +-7.2mb R_CUT +-3.0 TOTAL SL WIDTH +-1.6 WA +-2.3DGE 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 alphas uncertainty on R_CUT (alpha_s R_CUT), the effect of the uncertainty on mb 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).