MadGraph5_aMC@NLO

Error related to NLO processes generations

Asked by SUBHASISH BEHERA

Dear MG5 Team,
         I have import a model "loop_qcd_qed_sm" and try to generate processes :
z > b b~ [QED]

While generating I find the following errors :

launch auto
Traceback (most recent call last):
  File "/home/shibananda/RESEARCH/EVENT_GENERATORS/MG5_aMC_v2_4_0/madgraph/interface/extended_cmd.py", line 1009, in onecmd
    return self.onecmd_orig(line, **opt)
  File "/home/shibananda/RESEARCH/EVENT_GENERATORS/MG5_aMC_v2_4_0/madgraph/interface/extended_cmd.py", line 964, in onecmd_orig
    return func(arg, **opt)
  File "/home/shibananda/RESEARCH/EVENT_GENERATORS/MG5_aMC_v2_4_0/madgraph/interface/amcatnlo_run_interface.py", line 1205, in do_launch
    evt_file = self.run(mode, options)
  File "/home/shibananda/RESEARCH/EVENT_GENERATORS/MG5_aMC_v2_4_0/madgraph/interface/amcatnlo_run_interface.py", line 1362, in run
    jobs_to_collect,integration_step,mode,mode_dict[mode])
  File "/home/shibananda/RESEARCH/EVENT_GENERATORS/MG5_aMC_v2_4_0/madgraph/interface/amcatnlo_run_interface.py", line 1651, in collect_the_results
    jobs_to_run_new=self.update_jobs_to_run(req_acc,integration_step,jobs_to_run,fixed_order)
  File "/home/shibananda/RESEARCH/EVENT_GENERATORS/MG5_aMC_v2_4_0/madgraph/interface/amcatnlo_run_interface.py", line 1778, in update_jobs_to_run
    elif ( req_acc > 0 and err/tot > req_acc*1.2 ) or step <= 0:
ZeroDivisionError: float division by zero

Can someone help me out ....

Thanks,

Subhasish

Question information

Language:
English Edit question
Status:
Answered
For:
MadGraph5_aMC@NLO Edit question
Assignee:
No assignee Edit question
Last query:
Last reply:
Revision history for this message
Olivier Mattelaer (olivier-mattelaer) said : 		#1

Hi,

Our code are unable to make such computation for the moment. If you were using the latest version of the code, you would have face a nice crash stating it:

MG5_aMC>generate z > b b~ [QED]
Command "generate z > b b~ [QED]" interrupted with error:
InvalidCmd : MG5aMC can only handle QCD at NLO accuracy.
  We can however compute loop with [virt=QED].
  We can also compute cross-section for loop-induced processes with [noborn=QED]
Please report this bug on https://bugs.launchpad.net/mg5amcnlo
More information is found in 'MG5_debug'.
Please attach this file to your report.

Cheers,

Olivier

Can you help with this problem?

Provide an answer of your own, or ask SUBHASISH BEHERA for more information if necessary.

To post a message you must log in.