Changes to Madspin in MadGraph 2.8.x ?
Dear experts,
I am trying to produce some h + jets events with the Feynrule model HC_NLO_X0_UFO-heft with subsequent decay of the Higgs boson into W-bosons using MadSpin. In previous versions of MadGraph I never experienced any problem with this process, but since recent updates in the ATLAS software (or rather with the switch to MadGraph VERSION 2.8.1) I seem to not manage to make the decay
decay x0 > w+ w-
work anymore. MadSpin tells me:
"ZeroResult : No Phase Space. Please check particle masses."
which suggest to me that there is a problem with the fact that one of the W-bosons is supposed to be off-shell. Thus I wanted to ask whether something was changed related to MadSpin that would require some changes to the MadSpin card when using the model HC_NLO_X0_UFO-heft ?
Best regards,
Dominik
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