problem with calculating cross section in a certain pt in p p~ > a c-jet process

Asked by amir

Hi MG Developers

I have a problem with calculating in a gamma's pt = 78.1 through p p~ > a c-jet process. The error which i've got is :

aMCatNLOError : Some tests failed, run cannot continue.
Please check that widths of final state particles (e.g. top) have been set to 0 in the param_card.dat.

So please help me with this issue.

Best
#************************************************************
#* MadGraph5_aMC@NLO *
#* *
#* * * *
#* * * * * *
#* * * * * 5 * * * * *
#* * * * * *
#* * * *
#* *
#* *
#* VERSION 2.3.2.2 2015-09-06 *
#* *
#* 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
Traceback (most recent call last):
  File "/home/joachim/Desktop/MG/madgraph/interface/extended_cmd.py", line 889, in onecmd
    return self.onecmd_orig(line, **opt)
  File "/home/joachim/Desktop/MG/madgraph/interface/extended_cmd.py", line 882, in onecmd_orig
    return func(arg, **opt)
  File "/home/joachim/Desktop/MG/madgraph/interface/amcatnlo_run_interface.py", line 1202, in do_launch
    self.compile(mode, options)
  File "/home/joachim/Desktop/MG/madgraph/interface/amcatnlo_run_interface.py", line 3933, in compile
    self.check_tests(test, this_dir)
  File "/home/joachim/Desktop/MG/madgraph/interface/amcatnlo_run_interface.py", line 3944, in check_tests
    return self.parse_test_mx_log(pjoin(dir, '%s.log' % test))
  File "/home/joachim/Desktop/MG/madgraph/interface/amcatnlo_run_interface.py", line 3956, in parse_test_mx_log
    ' set to 0 in the param_card.dat.')
aMCatNLOError: Some tests failed, run cannot continue.
Please check that widths of final state particles (e.g. top) have been set to 0 in the param_card.dat.
Value of current Options:
              text_editor : None
                    pjfry : None
       cluster_local_path : /cvmfs/cp3.uclouvain.be/madgraph/
       group_subprocesses : Auto
ignore_six_quark_processes : False
    loop_optimized_output : True
    cluster_status_update : (600, 30)
             pythia8_path : None
                hwpp_path : None
                    golem : /home/joachim/Desktop/MG/golem95/lib
          pythia-pgs_path : /home/joachim/Desktop/MG/pythia-pgs
                  td_path : /home/joachim/Desktop/MG/td
             delphes_path : /home/joachim/Desktop/MG/Delphes
              thepeg_path : None
             cluster_type : condor
      exrootanalysis_path : /home/joachim/Desktop/MG/ExRootAnalysis
                      OLP : MadLoop
                 applgrid : /home/joachim/Desktop/applgrid/bin/applgrid-config
               eps_viewer : None
                  fastjet : None
                 run_mode : 2
              web_browser : None
   automatic_html_opening : False
        cluster_temp_path : None
             cluster_size : 100
            cluster_queue : None
             syscalc_path : /home/joachim/Desktop/MG/SysCalc
         madanalysis_path : /home/joachim/Desktop/MG/MadAnalysis
                   lhapdf : /home/joachim/Desktop/lhapdf/bin/lhapdf-config
             stdout_level : 20
            f2py_compiler : None
               hepmc_path : None
                  amcfast : amcfast-config
       cluster_retry_wait : 300
      output_dependencies : external
         fortran_compiler : None
                  nb_core : 4
         loop_color_flows : False
              auto_update : 7
         cluster_nb_retry : 1
                 mg5_path : /home/joachim/Desktop/MG
                  timeout : 60
                    gauge : unitary
      complex_mass_scheme : False
             cpp_compiler : None
   max_npoint_for_channel : 0

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,

from the syntax that you use, it seems that you ask such process @LO (which is meaningful)
But the error seems to indicate that you ask such process @NLO. Let me assume below that you indeed want NLO accuracy.

Asking for a given quark flavor in the final/initial state is ill-defined at NLO accuracy.
The only way to make a process with c/c~ in the final state meaningful @NLO, is to use the 3 flavor scheme (where the c is massive and therefore the mass prevent the divergencies. allowing to force the flavor). In that case you should not include the c-quark in the proton/jet definition.
Note that your process does not exist in the 3 flavor scheme.

In principle when trying to force a non massless quark flavor, you should have a clear warning that such process might not be defined @NLO.
I guess that you ignore such warning.
Before performing the actual generation of the events, we performed a series of check including the check that the loop cancel the infrared divergencies of the real (and some other check). As I would expect for this process such cancellation does not occur and the code then prevent you to continue.
If the code was not crashing then the result will be infinite/meaningless.

Cheers,

Olivier

> On Apr 27, 2016, at 08:52, amir <email address hidden> wrote:
>
> New question #292576 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/292576
>
> Hi MG Developers
>
> I have a problem with calculating in a gamma's pt = 78.1 through p p~ > a c-jet process. The error which i've got is :
>
> aMCatNLOError : Some tests failed, run cannot continue.
> Please check that widths of final state particles (e.g. top) have been set to 0 in the param_card.dat.
>
> So please help me with this issue.
>
> Best
> #************************************************************
> #* MadGraph5_aMC@NLO *
> #* *
> #* * * *
> #* * * * * *
> #* * * * * 5 * * * * *
> #* * * * * *
> #* * * *
> #* *
> #* *
> #* VERSION 2.3.2.2 2015-09-06 *
> #* *
> #* 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
> Traceback (most recent call last):
> File "/home/joachim/Desktop/MG/madgraph/interface/extended_cmd.py", line 889, in onecmd
> return self.onecmd_orig(line, **opt)
> File "/home/joachim/Desktop/MG/madgraph/interface/extended_cmd.py", line 882, in onecmd_orig
> return func(arg, **opt)
> File "/home/joachim/Desktop/MG/madgraph/interface/amcatnlo_run_interface.py", line 1202, in do_launch
> self.compile(mode, options)
> File "/home/joachim/Desktop/MG/madgraph/interface/amcatnlo_run_interface.py", line 3933, in compile
> self.check_tests(test, this_dir)
> File "/home/joachim/Desktop/MG/madgraph/interface/amcatnlo_run_interface.py", line 3944, in check_tests
> return self.parse_test_mx_log(pjoin(dir, '%s.log' % test))
> File "/home/joachim/Desktop/MG/madgraph/interface/amcatnlo_run_interface.py", line 3956, in parse_test_mx_log
> ' set to 0 in the param_card.dat.')
> aMCatNLOError: Some tests failed, run cannot continue.
> Please check that widths of final state particles (e.g. top) have been set to 0 in the param_card.dat.
> Value of current Options:
> text_editor : None
> pjfry : None
> cluster_local_path : /cvmfs/cp3.uclouvain.be/madgraph/
> group_subprocesses : Auto
> ignore_six_quark_processes : False
> loop_optimized_output : True
> cluster_status_update : (600, 30)
> pythia8_path : None
> hwpp_path : None
> golem : /home/joachim/Desktop/MG/golem95/lib
> pythia-pgs_path : /home/joachim/Desktop/MG/pythia-pgs
> td_path : /home/joachim/Desktop/MG/td
> delphes_path : /home/joachim/Desktop/MG/Delphes
> thepeg_path : None
> cluster_type : condor
> exrootanalysis_path : /home/joachim/Desktop/MG/ExRootAnalysis
> OLP : MadLoop
> applgrid : /home/joachim/Desktop/applgrid/bin/applgrid-config
> eps_viewer : None
> fastjet : None
> run_mode : 2
> web_browser : None
> automatic_html_opening : False
> cluster_temp_path : None
> cluster_size : 100
> cluster_queue : None
> syscalc_path : /home/joachim/Desktop/MG/SysCalc
> madanalysis_path : /home/joachim/Desktop/MG/MadAnalysis
> lhapdf : /home/joachim/Desktop/lhapdf/bin/lhapdf-config
> stdout_level : 20
> f2py_compiler : None
> hepmc_path : None
> amcfast : amcfast-config
> cluster_retry_wait : 300
> output_dependencies : external
> fortran_compiler : None
> nb_core : 4
> loop_color_flows : False
> auto_update : 7
> cluster_nb_retry : 1
> mg5_path : /home/joachim/Desktop/MG
> timeout : 60
> gauge : unitary
> complex_mass_scheme : False
> cpp_compiler : None
> max_npoint_for_channel : 0
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

Can you help with this problem?

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

To post a message you must log in.