Determination of |Vub| (DGE) for the (mX q2) analyses

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

|Vub| (DGE) for the (mX q2) analyses
Experiment Value [10-3] Parameters References Remarks
BELLE sim. ann. (m_{X}, q^{2}) 4.42 +/- 0.47 +/- 0.26 input Phys.Rev.Lett.92:101801,2004 (hep-ex/0311048) mX - Q2, tag with annealing method
BELLE (m_{X}, q^{2}) 4.72 +/- 0.37 +/- 0.28 input Phys.Rev.Lett.95:241801,2005 (hep-ex/0505088) mX, BRECO tag
BABAR (m_{X}, q^{2}) 4.50 +/- 0.30 +/- 0.26 input [arXiv:0708.3702v1] mX-q2, BRECO tag
Average +/- exp +/- (mb,theory) 4.56 +/- 0.22 +/- 0.26 chi2/dof = 0.43/2 (CL = 0.81) Plots: eps pdf gif mb input from PDG07 average
The full breakdown of the uncertainties on the average |Vub| above is (all errors quoted in percent):

+-3.2stat +-3.4exp +-1.3b2c model +-2.1b2u model +-0.7alpha_s R_CUT +-1.7mb R_CUT +-3.0 TOTAL SL WIDTH +-2.5 WA +-3.8DGE 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).