### Determination of |V_{ub}| (DGE) for the m_{X} analyses

The same m_{b} value for the fit over all the independent analyses is used

V_{ub} (DGE) for the m_{X} 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) |
m_{X}, BRECO tag; other methods (m_{X}-q^{2}
and P_{} not used) |

BABAR m_{X} |
4.56 +/- 0.22 +/- 0.32 |
input |
[arXiv:0708.3702v1] |
m_{X}-q^{2}, BRECO tag |

**Average +/- exp +/- (mb,theory) ** |
**4.40 +/- 0.27 +/- 0.28 ** |
** chi2/dof = 0.47/1 (CL = 0.49) ** |
Plots: eps
pdf
gif |
m_{b} from PDG07 average |

The full breakdown of the uncertainties on the average |Vub| above is
(all errors quoted in percent):
+-3.2_{stat}
+-2.1_{exp}
+-0.5_{b2c model}
+-1.8_{b2u model}
+-0.8_{alpha_s R_CUT}
+-4.1_{mb R_CUT}
+-3.0_{ TOTAL SL WIDTH}
+-1.5_{ WA}
+-3.5_{DGE theory}

=+-7.7_{tot}
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).