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

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.
>
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