Crossfeed issue in roofit!

Roofit and RooStats
1

Dear experts,

I am trying to fit a distribution using complex roofit function. However, I am getting a cross-feed between number of signals (nsig) and number of background (nbkg) obtained from the fit. These numbers are way off from the truth matched numbers for nsig and nbkg.

How can I address this, the fit seems fine!
lambda_ubfitinvmonly.C (10.2 KB)

2

Dear Vikas,

Hard to say. Do you believe this is an issue of ROOT? If yes, could you please provide a minimal standalone reproducer that shows the alleged bug?

Best,
Danilo

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