I have tested that setting the merged R2 for gggg to zero was leading to the following difference to the g g > g g [virt=QCD]:
Finite = -6.6634187771890723e+01 [result in 2.6.3 and in this branch]
to
Finite = -6.6714876289454040e+01 [hack code to set this contribution to 0]
So we have at least that parralel test which is sensitive to such modification so we should be safe here.
Hi,
I have tested that setting the merged R2 for gggg to zero was leading to the following difference to the g g > g g [virt=QCD]: 0723e+01 [result in 2.6.3 and in this branch] 4040e+01 [hack code to set this contribution to 0]
Finite = -6.663418777189
to
Finite = -6.671487628945
So we have at least that parralel test which is sensitive to such modification so we should be safe here.
Cheers,
Olivier