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Dear Zfit experts,
I just discovered Zfit and I am very happy about its capabilities. I have a very naive question.
I am trying to create an ExtendedUnbinnedNLL made of exponential pdfs with weighted data. I am extracting the hesse errors for :
- The exponential parameters --> Which seem reasonable
- The normalization parameters (yield) --> Which is almost 0.
I am not sure why (2) happens, through other frameworks (Like RooFit etc.) I get the almost the same results for the exponential parameter and its error and the same normalization parameter but higher error.
I am using zfit version : 0.16.0
I attach the code and the log file with the results.
Thank you very much for your time!
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