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Hi Wolfgang, > >> A couple of warnings > >> > >> 1) I previously run the fits WITHOUT the B&D reweighting (-b -d flags), > >> so I run them again and the ratio on the entire sample went from 0.55 to > >> 0.60. I hope Kerstin was more clever than me and run with -b and -d ;-) > > I did run with -d -b. > > > >> 2) Wolfgang mentions that the signal has been reweigthed to match the > >> Run1+2/Run3+4 luminosity ratios ub data. A point related to this is: > >> what happens if you run on Run1+2 or Run4 only? > > As long as the magic k numbers are correct, applying the weights to SP5 > > when running on Run1+2 should not hurt I think, as it only changes the > > effective number of events (as most of the other reweightings do), but it > > keeps the relative fraction as we want them. > > As Kerstin said, the SP5/SP6 scaling should be save. There is no scaling > on SP6. The scaling on SP6 will not hurt as the magic k factor is also > calculated taking the run period into account (I hope). > > > >> In this case you should > >> not apply any reweighting at all and you should also use different magic > >> factors. Did anybody check this? > > I did recompute the magic k numbers when we introduced this SP5/SP6 > > correction. I am sure I did it for the full statistics and I just > > crosschecked with my notes that I also recomputed the numbers for the > > individual run periods as they are in wfermifile.dat, assuming the SP5 vs. > > SP6 reweighting will be done independent of the run flag. So I think > > things are used consistently here. > > For the new weights/weight files, the wfermifile is not used any more > and the magic factor is calculated on the fly. Please check the output > of the log file. BUT I check the code with Kerstin against her numbers. Are these the numbers that are computed automatically: B0bar -> Xu+ l- nubar + CC = 1.03533 B- -> Xu0 l- nubar + CC = 1.0335 ? I got these numbers from my logfile for Run1+2. These are actually different from the numbers I see in the wfermifile for Run1+2 (those are smaller than 1). Are you saying they should be the same? Kerstin