 |
 |
Hi, here are some more numbers along these lines... I had a closer look at the number of events in the generic MC we are using. In the reduced ntuples (without any cuts, fits, ...) we have the following numbers of entries in the TTree: Run1+2 448821 Run4 1196783 the ratio of these is 2.667 looking at Roberto's tcl files, I find these numbers (the numbers of events we run over in production): Run1-2 19880359 Run4 52091689 and the ratio is 2.620. This looks to me as if our ratio of generic MC between SP5 and SP6 simply does not match the ratio of luminosities in the corresponding runs in data. I thought we are supposed to use SP5 and SP6 so that it corresponds to the lumi ratios.... in data I see in the tcl files Run1+2 16784377 Run4 23104133 and the ratio is 1.377. Are we not using all of the generic SP5? Or do we somehow use extra SP6? How did this come about? Could someone (Roberto, Wolfgang, ?) please clarify this? Kerstin > The interesting point is that the SP6/SP5 yield is different from > the ratio of Run4/Run1+2 luminosities, take e.g. your Vcb 1'bin numbers: > > SP6/SP5 = 1327.69/482.67 = 2.75 > Run4/Run1+2 = 100ifb/80ifb = 1.25