Hi @StephanH, thanks for your response. I can fill in some more details. In the attached plot, I find a disagreement between what RooAddPdf::getVal() returns and what I expect. “Real Sum” shows the sum of [pdfA normalized to varB.getVal()] + [gaus normalized to norm]. “RooAddPdf” shows the output from model normalized to model.expectedEvents().
However, when I look at model.expectedEvents(), I find that this is equal to varB.getVal()+norm.getVal().
So my question really is: why aren’t these consistent? I think I’m missing something about what RooAddPdf is doing such that my assumption that these should be the same is not correct. Thanks very much for your help.
