MadGraph5_aMC@NLO

No valid decay for 6

Asked by Abdellah Tnourji

Dear expert,

When I generate the process :

p p > t t~ QCD=2 QED=0 NP=2 [QCD]

my goal is to add the spin correlation so I edited the madspin card :

decay t > w+ b, w+ > l+ vl
decay t~ > w- b~, w- > l- vl~
decay w+ > l+ vl
decay w- > l- vl~

But I got the following error :

MadGraph5Error : No valid decay for 6. No 2 body decay for that particle. (three body are not supported by MadSpin)

Could you help me, please?
Thank you.

A.Tnourji.

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Abdellah Tnourji
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Abdellah Tnourji (atnourji) said : 		#1

Hello,

I solved my problem by using a restriction card with no4f operators and replacing the existing information about the top W, Z decays width in param_card.dat to non zero value.

Cheers,
A.Tnourji