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Hoi Ric, why don't we take the "correct" value of 10.4% for b2c as in decay.dec to which your simuboot checks will converge if you use enough statistics? And why don't we subtract the b2u instead of dividing? Cheers, --U. Riccardo Faccini writes: > > Riccardo is verifying that the total BR corresponds to 10.4% looking at > > MC truth at generator level. > > > I run at simuboot level over 110K generic Bch and 110K generic B0 with no > selection whatever and I counted the number of events with a semileptonic B at generator > level. > > I counted 10.56+/-0.04 % , consistent between electrons and muons, B0 and > Bch. > > In order to get the Br(b->clnu) one needs to divide by 1.0123 in order to > subtract the Vub component and therefore > > Br(b->clnu) in generic =(10.43 +/- 0.04)% > > Ric