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Hi, I did a few homeworks: - I computed the significance of the B0-Bch discrepancy on the basis of the events measured in the first bin. Details are in the BAD (see http://www.slac.stanford.edu/~rfaccini/phys/vub/b0bch.ps ) but the conclusion is that we have a 2.9 sigma effect (which now is the same as taking the errors on the BF, but this morning this was not the case...) - I estimated the amount of splitoffs: track split offs are ~0.02% while the neutral ones in the worst case (SP3) are 0.9% - I estimated the fraction of DDX background (regardless of the fact that there is actually a lepton) after all cuts to be 9% more to come bye ric