"Decay without corresponding particle in core process" explanation?
Hi, I am trying to generate a hard process for proton collisions which gives rise to susy particles, which subsequently decay to a neutralino and a SM particle (to conserve R-parity). Here is a sample input and the corresponding error:
Command "generate p p > susy susy, susy > n1 sm " interrupted in sub-command:
"generate p p > susy susy, susy > n1 sm" with error:
InvalidCmd : Decay without corresponding particle in core process. Please check your process definition.
What's odd is that MadGraph generates all the process: all the hard process, and all the right decays, but then proceeds to give me this error. It's as if MadGraph is insisting that the final states be one of the states involved in the hard process, but I don't understand why that would be necessary, and it's definitely not what I'm trying to achieve.
for completeness here are the multiparticle labels I'm using:
susy = go ul cl t1 ur cr t2 dl sl b1 dr sr b2 ul~ cl~ t1~ ur~ cr~ t2~ dl~ sl~ b1~ dr~ sr~ b2~ sve svm svt el- mul- ta1- er- mur- ta2- sve~ svm~ svt~ el+ mul+ ta1+ er+ mur+ ta2+ x1+ x2+ n1 n2 n3 n4 x1- x2-
sm = g u c d s u~ c~ d~ s~ a ve vm vt e- mu- ve~ vm~ vt~ e+ mu+ t b t~ b~ w+ z w- ta- ta+
p = g u c d s u~ c~ d~ s~
Thank you for any input.
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