Hoi, ok, I redid the mode-dependent study, you can find them starting at http://www.slac.stanford.edu/BFROOT/www/Physics/Analysis/AWG/InclusiveSL/islrecoil/modes/modes.html The signal pdf is a gaussian for the mode-dependent mes plots. All modes I see are shown. No cut on purity has been applied. All data in Run 1 in superblock 1 and 2 are used. I now see 41376 B candidates, fitted with CB, this is due to the patched B+ modes, see http://www.slac.stanford.edu/BFROOT/www/Physics/Analysis/AWG/InclusiveSL/islrecoil/modes/mesallevents-0-1.eps You can run the relevant macro by doing cd ~ursl/root/anaRecoil root .L .../recoil.C // wherever you have your IBU stuff loadMergedFiles() plotMes(2) // the argument is the offset for the file Note: Please edit recoil.C first, so that you dump the plots into another location (search for 'name' in plotMes() ...). Of course, you can run it on your own rootfiles as well, just edit loadMergedFiles(). Merry Christmas, now for good! --U.