Can't decay top quark in mu mu > vv tt~ z{0} using Madspin
I was trying to generate mu+ mu- > vm vm~ t t~ z{0} in 30 TeV in the sm-no_widths mode, and decay finals states with Madspin as following :
t > w+ b, w+ > l+ vl
t~ > w- b~, w- > l- vl~
z > l+ l-
The results I get is the following:
"Error detected in "generate_events run_02"
write debug file /Users/
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str : A compilation Error occurs when trying to compile /Users/
The compilation fails with the following output message:
gfortran -w -fPIC -ffixed-
configs_
9 | PRWIDTH(-2)=ZERO
| 1
Error: Symbol 'zero' at (1) has no IMPLICIT type
make: *** [driver.o] Error 1
Please try to fix this compilations issue and retry.
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I couldn't make sense of it. Would appreciate some help! The version I'm using is MG5_aMC_v3_2_0.
PS1, you might wonder why I'm using no-widths mode. That's because longitudinal polarization for w,z in the final states can cause unphysical energy increase due to unclean gauge cancellation. One solution is set all width to be zero, and let Madspin decay the final states. But this strategy doesn't seem to work here.
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