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> > - the data-MC comparison looks very nice. Only issue I have is about the > > mx comparison for the depleted sample. I see the presence of tails that in > > CM1 was not there. It is striking without cuts where you can see a huge > > bin at zero. Do we understand that? > > The peak is mainly due to the underflows of the mxhadfit distribution, > that are put all together in the first bin (there is a small peak in the > last bin as well, those events are all overflows). This reflects the fact > that in many cases the VtxTreeFitter fails the fit and returns large > negative values. This is one of the reasons why we decided to do the CM2 > analysis (at least for now) only on non-fitted variables. yes ok but what about the tails then? Daniele