Likelihood minimisation with a conditional model/pdf

[Up_Rooted]

I believe this problem can be solved by leveraging the RooSimPdfBuilder class with multiple prototype pdfs

See here:

RooSimPdfBuilder with 2 prototype pdfs

Solved! The problem is that you have to feed the ingredient pdfs of the RooSimultaneous to the RooSimPdfBuilder constructor e.g: RooSimPdfBuilder mgr(DC, gauss_1, gauss_2.....) ; Not just the RooSimultaneous itself e.g: RooSimPdfBuilder mgr(simPdf) ; The solution was found here: root.cern.ch/root/html510/src/R … r.cxx.html Thanks to those that replied! S

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