MadGraph5_aMC@NLO

Missing external routines (BSM_gg_hh)

Asked by Florian Bury

Hi,

Seems like I was a bit too hopeful in my previous thread...

I found a model for HH production from CMS [1], I can generate a process and its diagrams, but not output the model.

import model BSM_gg_hh
generate g g > h h, (h > w+ w-, w+ > e+ ve, w- > e- ve~), h > b b~

When I try to output I get

Command "output test_HH" interrupted with error:
ALOHAERROR : No external routine "VVSS2_1.f" in directories
  /home/lw23382/Documents/MEM_DNN_project/MG5_aMC_v3_5_1/models/BSM_gg_hh/Fortran
 /home/lw23382/Documents/MEM_DNN_project/MG5_aMC_v3_5_1/models/BSM_gg_hh
 /home/lw23382/Documents/MEM_DNN_project/MG5_aMC_v3_5_1/aloha/template_files
Please report this bug on https://bugs.launchpad.net/mg5amcnlo
More information is found in 'MG5_debug'.
Please attach this file to your report.

I also tried the MoMEMta exporter, which can be output but not built (obviously for the same reason of missing routines).

This I expect is more a problem of the model rather than madgraph itself, and I will try to track down its author, but if you have any suggestion in the meantime it could be useful.

Cheers,
Florian

[1] https://cms-project-generators.web.cern.ch/cms-project-generators/BSM_gg_hh.tar

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Olivier Mattelaer (olivier-mattelaer) said : 		#1

For the fortran output, you likely need to do
output --hel_recycling=False

That forbids some MG5aMC optimization which requires special aloha routine and since aloha is partly de-activated for the model this optimization is bound to fail for model created before such optimization was existing.
(This does not mean that the code will work at fortran level but this is worth the test).

For momenta, yes you are back to the initial problem that you will need to translate the functions of the Fortran directory to C++ before being able to use momenta.

Cheers,

Olivier

Revision history for this message
Florian Bury (fbury) said : 		#2

Indeed, the command worked, but yes for MoMEMta it seems I have some fortran exercise for the weekend !

Thanks Olivier!

Florian