Determination of |V_ub| (DGE) for the (m_X q²) analyses

The same m_b 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):

+-3.2_stat +-3.4_exp +-1.3_{b2c model} +-2.1_{b2u model} +-0.7_{alpha_s R_CUT} +-1.7_{mb R_CUT} +-3.0 _{TOTAL SL WIDTH} +-2.5 _WA +-3.8_{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).