Bug with RooExtendPdf produces inconsistency in rf204b_extendedLikelihood_rangedFit.C between before 6.26 and after 6.28

Roofit and RooStats
1

Dear experts,

I am reporting a bug in RooExtendPdf, which can be seen in rf204b_extendedLikelihood_rangedFit.C of the tutorial. In the recent versions, the fit using RooExtendPdf class has wrong best-fit values of N=4494 (and \alpha is biased as well) while the fit using the composite of signal and background PDFs implemented by RooAddPdf correctly fits the distribution with N=9990.

Looking back into the past versions, this issue appears since version 6.28.

Best regards,
Atsushi

2

Hi @atsushi , thanks for your report.

The best place to report bugs is actually the GitHub issues tracker: Issues · root-project/root · GitHub

Maybe it’s best if your move your bug report there?

Thanks!

Silia

3

(post deleted by author)

4

Done. Thank you.