Change Rivet default cross-section from 0 to 1?
We might want to change the default cross-section in Rivet: if the user doesn't supply a cross-section and there is none specified in the GenEvent
, we currently set {0.0,0.0}
as the cross-section value/error pair.
That will then be in the raw _XSEC object and so you can't even supply a cross-section via file-scaling in rivet-merge
later on, because the file-based scale factor is multiplied with what's in the raw _XSEC