We are trying to make post-fit plots, displaying the uncertainty from the PDF. However, the error band is much smaller than expected comparing to pre-fit uncertainty. We found some ticket reporting trouble propagating normalization uncertainty (ticket name: [Normalization uncertainties in VisualizeError])
And we found the follow up discussion about this bug not fully fixed by adding Normalization() for RooSimultaneousPdf: ROOT-9971
Here are the plotOn cmds we have:
Using Normalization() the error band disappeared.
We use an older root version: 6.10/06
We wonder if this issue persists? Is there a workaround about it in the old root version? Many thanks in advance.