MadGraph5_aMC@NLO

Problem wih vertex FFSS and Pythia

Asked by Jeremy Neveu

Hi,

I'm trying to plug a new model involving a scalar field with Feynrules/Madgraph5/Pythia8. Everything is ok until I want to make an output for pythia8 :

[...]
ALOHA: aloha creates VVV1 routines
ALOHA: aloha creates SSSS1 routines
ALOHA: aloha creates FFSS1 routines
Command "output pythia8 test -f" interrupted with error:
  File "/home/irfulx174/mnt/jneveu/Documents/CMS/MonteCarlo/MadGraph5_v1_3_16/madgraph/iolibs/export_cpp.py", line 1894, in write_aloha_routines
    aloha_model.compute_all(save=False)
  File "/home/irfulx174/mnt/jneveu/Documents/CMS/MonteCarlo/MadGraph5_v1_3_16/aloha/create_aloha.py", line 469, in compute_all
    self[(lorentz.name, outgoing)].add_combine(m)
KeyError: ('FFSS1', 4)

If I run only output test -f, there is no problem, so I guess it comes from the interfacing between MadGraph and Pythia, or maybe a limitation of Pythia (but I don't find information about that). Can you help me please?

Thanks!

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Johan Alwall (johan-alwall) said : 		#1

Hello Jeremy,

Thanks for your report. Could you please attach your model UFO files (as a tar.gz), so we can test it? Also please specify which process you were trying when you got the error.

In fact, you could transfer this to a bug report instead of a question.

Many thanks,
Johan

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Olivier Mattelaer (olivier-mattelaer) said : 		#2

Just to say here, that the bug is fixed, so I'll change the status of this question to answered.

Cheers,

Olivier

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