### Determination of |V_{ub}| (DGE) for the P^{+} analyses

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

|V_{ub}| (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 |
m_{b} from the PDG07 average |

The full breakdown of the uncertainties on the average |Vub| above is
(all errors quoted in percent):
+-3.6_{stat}
+-2.9_{exp}
+-1.8_{b2c model}
+-2.3_{b2u model}
+-1.1_{alpha_s R_CUT}
+-7.2_{mb R_CUT}
+-3.0_{ TOTAL SL WIDTH}
+-1.6_{ WA}
+-2.3_{DGE theory}

=+-10.0_{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).