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Hi all, this is the effect of removing ssbar popping events from our signal model Default BRBR = 0.0202685 +- 0.00250473(stat) +- 0.00106675(MC stat) No ssbar events in signal BRBR = 0.0186895 +- 0.00230994(stat) +- 0.000980661(MC stat) that implies a difference of 7.7% mostly due to the change on the Eps_u efficiency. Now the question is: do we want to keep the full variation of 7.7% as systematic effect? With this additional error we will have: - error(model b->u) 6% -> 9.7% - tot exp error 11.4% -> 13.7% - tot error 20.8% -> 22.2% Daniele On Wed, 19 Mar 2003, Urs Langenegger wrote: > > Hoi, > > in ~ursl/root/anaQA-o00/. you can find the usual set of merged > rootfiles containing the "wKK" member in the "events" tree. Feel free > to start implementing something in the fit to reweight events with > ssbar in the Xu system (events with KKbar in the Xu have wKK ==1, > those without have wKK == 0). > > The default fit on these files gives BRBR = 0.0202685, which is 2.5% > above the iteration with n00. Offhand, I don't know why it's not > identical. I will be running another identical batch after the KL > systematics batch is done. > > Cheers, > --U. > >