Hi all, I have discovered that I forgot to include the request to run on signal enriched sample when performing the mx scan in the all cut selection. So I have reproduced the plots again with correct requirements and updated the webpage http://www.slac.stanford.edu/~petrella/truthm/R18/truthmatching.html (see plots on the top of the page) I repeated the mx scan with truth-matching algorithm n° 4 and with this correction the peaking bkg component in each mx bin seems to be a bit more consistent to the value we observe in the all cut selection (the magenta straight line). Antonio