MG5_aMC_v2_6_1 Madevent generation efficiency for WW scattering with same sign
I have been trying to generate a MG5_aMC_v2_6_1 sample of 100000 events at 100TeV (FCC-hh) for vector boson scattering with final states ZZ and WW(same sign). For the process pp>ZZjj QED=4 it's all fine and I get the requested number of events without problems, but for the process pp>W+W+jj QED=4 , I am getting just around 150 events out of the requested 100K , which corresponds to an efficiency of about 0.15% !
It seems the problem is related to the default PDF in run_card.dat ( nn23lo1 ) because if I change the ECM to 13TeV the efficiency goes up to 100% also for the WW case.
I think this issue might also be related to the fact that WW ( same sign ) involves only quarks in initial state while ZZ involve other parton combinations as well...
What PDF should I use for 100TeV event generation ?
Cheers,
Andre
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