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I would be wary of using just PDG numbers for the individual BFs, as they do not take into account two important pieces of information: 1) isospin symmetry - this is on very solid grounds for b->clnu decays; one needs to impose it on the widths, i.e. accounting for the lifetime ratio. 2) the inclusive electron momentum spectrum should be reproduced by the sum of exclusive modes, and we know it isn't. This evidence of a problem is our motivation for choosing generous uncertainties on the BFs. Having said that, it would be great if someone went through the exercise of updating (or at least re-verifying) these numbers. Bob On Wed, 20 Apr 2005, Kerstin Tackmann wrote: > > Hi, > > I looked at the branching fractions that we use for the reweighting in > RecoilAnalysis for the B->D(*,**)(pi)lnu decays. The values currently in > there come from the reweighting page and do not correspond to any PDG > values. So I wonder if and how these will be updated. > Will there be a new compilation like the one on the reweighting page > http://www.slac.stanford.edu/BFROOT/www/Physics/Analysis/AWG/InclusiveSL/common/main.html? > Or should we be using the PDG04 values? Or something else? > > Cheers, > Kerstin > \\\\\\\\\\\\\\\\\//////////////////\\\\\\\\\\\\\\\\\////////////////// / Robert V. Kowalewski \/ Dept. of Physics and Astronomy \ \ particle.phys.uvic.ca/~kowalews /\ University of Victoria / / Tel: (250)721-7705 \/ P.O. Box 3055 \ \ Email: [log in to unmask] /\ Victoria, BC V8W 3P6 / /////////////////\\\\\\\\\\\\\\\\\\/////////////////\\\\\\\\\\\\\\\\\\