Problem with W+ W- > W+ W- at one loop

Asked by Ibano Heyth on 2021-02-08

Dear MG experts,

I've been trying to run the following process:
        W+ W- > W+ W- [QCD QED]
and I got the following error message:
Error detected in "launch auto --name run-uuuu-170"
aMCatNLOError : Poles do not cancel, run cannot continue

Here is the debug file:
#************************************************************
#* MadGraph5_aMC@NLO *
#* *
#* * * *
#* * * * * *
#* * * * * 5 * * * * *
#* * * * * *
#* * * *
#* *
#* *
#* VERSION 3.0.3 2020-06-07 *
#* *
#* The MadGraph5_aMC@NLO Development Team - Find us at *
#* https://server06.fynu.ucl.ac.be/projects/madgraph *
#* and *
#* http://amcatnlo.cern.ch *
#* *
#************************************************************
#* *
#* Command File for aMCatNLO *
#* *
#* run as ./bin/aMCatNLO.py filename *
#* *
#************************************************************
launch auto --name run-uuuu-170
Traceback (most recent call last):
  File "/home/kamel/Documents/MG5_aMC_v3_0_3/madgraph/interface/extended_cmd.py", line 1518, in onecmd
    return self.onecmd_orig(line, **opt)
  File "/home/kamel/Documents/MG5_aMC_v3_0_3/madgraph/interface/extended_cmd.py", line 1467, in onecmd_orig
    return func(arg, **opt)
  File "/home/kamel/Documents/MG5_aMC_v3_0_3/madgraph/interface/amcatnlo_run_interface.py", line 1774, in do_launch
    self.compile(mode, options)
  File "/home/kamel/Documents/MG5_aMC_v3_0_3/madgraph/interface/amcatnlo_run_interface.py", line 5389, in compile
    self.check_tests(test, this_dir)
  File "/home/kamel/Documents/MG5_aMC_v3_0_3/madgraph/interface/amcatnlo_run_interface.py", line 5402, in check_tests
    return self.parse_check_poles_log(pjoin(dir, '%s.log' % test))
  File "/home/kamel/Documents/MG5_aMC_v3_0_3/madgraph/interface/amcatnlo_run_interface.py", line 5435, in parse_check_poles_log
    raise aMCatNLOError('Poles do not cancel, run cannot continue')
aMCatNLOError: Poles do not cancel, run cannot continue
Value of current Options:
              text_editor : None
      notification_center : True
       cluster_local_path : None
  default_unset_couplings : 99
       group_subprocesses : Auto
ignore_six_quark_processes : False
    loop_optimized_output : True
    cluster_status_update : (600, 30)
         fortran_compiler : None
               hepmc_path : None
                  collier : /home/kamel/Documents/MG5_aMC_v3_0_3/HEPTools/lib
              auto_update : 7
             pythia8_path : None
                hwpp_path : None
low_mem_multicore_nlo_generation : False
                    golem : None
          pythia-pgs_path : None
                  td_path : None
             delphes_path : None
              thepeg_path : None
             cluster_type : condor
        madanalysis5_path : None
      exrootanalysis_path : None
                      OLP : MadLoop
                 applgrid : applgrid-config
               eps_viewer : None
                  fastjet : fastjet-config
                 run_mode : 2
              web_browser : None
   automatic_html_opening : False
        cluster_temp_path : None
             cluster_size : 100
            cluster_queue : None
             syscalc_path : None
         madanalysis_path : None
                   lhapdf : lhapdf-config
             stdout_level : 20
                  nb_core : 8
            f2py_compiler : None
                    ninja : /home/kamel/Documents/MG5_aMC_v3_0_3/HEPTools/lib
include_lepton_initiated_processes : False
                  amcfast : amcfast-config
       cluster_retry_wait : 300
      output_dependencies : external
           crash_on_error : False
mg5amc_py8_interface_path : None
         loop_color_flows : False
                  samurai : None
         cluster_nb_retry : 1
                 mg5_path : /home/kamel/Documents/MG5_aMC_v3_0_3
                  timeout : 60
                    gauge : unitary
      complex_mass_scheme : False
             cpp_compiler : None
   max_npoint_for_channel : 0

===============================================
Thanks for your help.

Question information

Language:
English Edit question
Status:
Solved
For:
MadGraph5_aMC@NLO Edit question
Assignee:
No assignee Edit question
Solved by:
Olivier Mattelaer
Solved:
2021-02-08
Last query:
2021-02-08
Last reply:
2021-02-08

Hi,

This is not a process/syntax that can be computed in NLO Electro-weak.
Please check: https://inspirehep.net/literature/1670211 <https://inspirehep.net/literature/1670211>
in particular Table-4 which discussed how need to be setup the multi-particles status in the initial state.

Cheers,

Olivier

> On 8 Feb 2021, at 11:20, Ibano Heyth <email address hidden> wrote:
>
> New question #695422 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/695422
>
> Dear MG experts,
>
> I've been trying to run the following process:
> W+ W- > W+ W- [QCD QED]
> and I got the following error message:
> Error detected in "launch auto --name run-uuuu-170"
> aMCatNLOError : Poles do not cancel, run cannot continue
>
> Here is the debug file:
> #************************************************************
> #* MadGraph5_aMC@NLO *
> #* *
> #* * * *
> #* * * * * *
> #* * * * * 5 * * * * *
> #* * * * * *
> #* * * *
> #* *
> #* *
> #* VERSION 3.0.3 2020-06-07 *
> #* *
> #* The MadGraph5_aMC@NLO Development Team - Find us at *
> #* https://server06.fynu.ucl.ac.be/projects/madgraph *
> #* and *
> #* http://amcatnlo.cern.ch *
> #* *
> #************************************************************
> #* *
> #* Command File for aMCatNLO *
> #* *
> #* run as ./bin/aMCatNLO.py filename *
> #* *
> #************************************************************
> launch auto --name run-uuuu-170
> Traceback (most recent call last):
> File "/home/kamel/Documents/MG5_aMC_v3_0_3/madgraph/interface/extended_cmd.py", line 1518, in onecmd
> return self.onecmd_orig(line, **opt)
> File "/home/kamel/Documents/MG5_aMC_v3_0_3/madgraph/interface/extended_cmd.py", line 1467, in onecmd_orig
> return func(arg, **opt)
> File "/home/kamel/Documents/MG5_aMC_v3_0_3/madgraph/interface/amcatnlo_run_interface.py", line 1774, in do_launch
> self.compile(mode, options)
> File "/home/kamel/Documents/MG5_aMC_v3_0_3/madgraph/interface/amcatnlo_run_interface.py", line 5389, in compile
> self.check_tests(test, this_dir)
> File "/home/kamel/Documents/MG5_aMC_v3_0_3/madgraph/interface/amcatnlo_run_interface.py", line 5402, in check_tests
> return self.parse_check_poles_log(pjoin(dir, '%s.log' % test))
> File "/home/kamel/Documents/MG5_aMC_v3_0_3/madgraph/interface/amcatnlo_run_interface.py", line 5435, in parse_check_poles_log
> raise aMCatNLOError('Poles do not cancel, run cannot continue')
> aMCatNLOError: Poles do not cancel, run cannot continue
> Value of current Options:
> text_editor : None
> notification_center : True
> cluster_local_path : None
> default_unset_couplings : 99
> group_subprocesses : Auto
> ignore_six_quark_processes : False
> loop_optimized_output : True
> cluster_status_update : (600, 30)
> fortran_compiler : None
> hepmc_path : None
> collier : /home/kamel/Documents/MG5_aMC_v3_0_3/HEPTools/lib
> auto_update : 7
> pythia8_path : None
> hwpp_path : None
> low_mem_multicore_nlo_generation : False
> golem : None
> pythia-pgs_path : None
> td_path : None
> delphes_path : None
> thepeg_path : None
> cluster_type : condor
> madanalysis5_path : None
> exrootanalysis_path : None
> OLP : MadLoop
> applgrid : applgrid-config
> eps_viewer : None
> fastjet : fastjet-config
> run_mode : 2
> web_browser : None
> automatic_html_opening : False
> cluster_temp_path : None
> cluster_size : 100
> cluster_queue : None
> syscalc_path : None
> madanalysis_path : None
> lhapdf : lhapdf-config
> stdout_level : 20
> nb_core : 8
> f2py_compiler : None
> ninja : /home/kamel/Documents/MG5_aMC_v3_0_3/HEPTools/lib
> include_lepton_initiated_processes : False
> amcfast : amcfast-config
> cluster_retry_wait : 300
> output_dependencies : external
> crash_on_error : False
> mg5amc_py8_interface_path : None
> loop_color_flows : False
> samurai : None
> cluster_nb_retry : 1
> mg5_path : /home/kamel/Documents/MG5_aMC_v3_0_3
> timeout : 60
> gauge : unitary
> complex_mass_scheme : False
> cpp_compiler : None
> max_npoint_for_channel : 0
>
> ===============================================
> Thanks for your help.
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

Ibano Heyth (heyth) said : #2

Alright. Thanks Olivier

Ibano Heyth (heyth) said : #3

Thanks Olivier Mattelaer, that solved my question.