Determination of |Vub| (DGE) for the mX analyses

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

Vub (DGE) for the mX analyses
Experiment Value [10-3] Parameters References Remarks
BELLE m_{X} 4.29 +/- 0.28 +/- 0.28 input Phys.Rev.Lett.95:241801,2005 (hep-ex/0505088) mX, BRECO tag; other methods (mX-q2 and P not used)
BABAR m_{X} 4.56 +/- 0.22 +/- 0.32 input [arXiv:0708.3702v1] mX-q2, BRECO tag
Average +/- exp +/- (mb,theory) 4.40 +/- 0.27 +/- 0.28 chi2/dof = 0.47/1 (CL = 0.49) Plots: eps pdf gif mb from PDG07 average
The full breakdown of the uncertainties on the average |Vub| above is (all errors quoted in percent):

+-3.2stat +-2.1exp +-0.5b2c model +-1.8b2u model +-0.8alpha_s R_CUT +-4.1mb R_CUT +-3.0 TOTAL SL WIDTH +-1.5 WA +-3.5DGE 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).