jet matching showering with Pythia 8

Asked by Antara Sarkar on 2020-05-27

Dear MG5 team,

I am trying to generate VBF process and match it with 1 additional jet.

define v = w+ w- z
generate p p > h j j $$v @0
add process p p > h j j j $$v @1

Then I shower this process with Pythia8 alongwith MLM jet matching. The qcut value is chosen to be 30.

Could you please tell if adding the second process is sufficient or not for matching or should I add another process:
add process p p > h j j j j $$v @2

Also, in Pythia8 card, the 'JetMatching:nMax' should be set to 2, right? Because the number of jets in the final state should be 2.

Third problem is: This process gets stuck with Pythia8. Here's what is displayed:

  === Results Summary for run: run_01 tag: tag_1 ===

     Cross-section : 5.702 +- 0.04268 pb
     Nb of events : 1000

INFO: Creating Plots for parton level
INFO: Plots for parton level generated, see /home/dell/my_computation/MG5_aMC_v2_6_7/hjj_matching_trial/HTML/run_01/plots_parton.html
INFO: End Plots for parton level
store_events
INFO: Storing parton level results
INFO: End Parton
reweight -from_cards
decay_events -from_cards
INFO: Running Pythia8 [arXiv:1410.3012]
No user-defined value for Pythia8 parameter 'JetMatching:nJetMax'. Setting it automatically to 1.
Splitting .lhe event file for PY8 parallelization...
Submitting Pythia8 jobs...
Pythia8 shower jobs: 0 Idle, 4 Running, 0 Done [0 second]
/home/dell/my_computation/MG5_aMC_v2_6_7/hjj_matching_trial/Events/run_01/PY8_parallelization/run_PY8.sh: line 2: 7602 Segmentation fault (core dumped) ./MG5aMC_PY8_interface PY8Card.dat &> PY8_log.txt
/home/dell/my_computation/MG5_aMC_v2_6_7/hjj_matching_trial/Events/run_01/PY8_parallelization/run_PY8.sh: line 2: 7603 Segmentation fault (core dumped) ./MG5aMC_PY8_interface PY8Card.dat &> PY8_log.txt
/home/dell/my_computation/MG5_aMC_v2_6_7/hjj_matching_trial/Events/run_01/PY8_parallelization/run_PY8.sh: line 2: 7600 Segmentation fault (core dumped) ./MG5aMC_PY8_interface PY8Card.dat &> PY8_log.txt
/home/dell/my_computation/MG5_aMC_v2_6_7/hjj_matching_trial/Events/run_01/PY8_parallelization/run_PY8.sh: line 2: 7601 Segmentation fault (core dumped) ./MG5aMC_PY8_interface PY8Card.dat &> PY8_log.txt
WARNING: program /home/dell/my_computation/MG5_aMC_v2_6_7/hjj_matching_trial/Events/run_01/PY8_parallelization/run_PY8.sh 3 launch ends with non zero status: 139. Stop all computation
WARNING: program /home/dell/my_computation/MG5_aMC_v2_6_7/hjj_matching_trial/Events/run_01/PY8_parallelization/run_PY8.sh 0 launch ends with non zero status: 139. Stop all computation
WARNING: program /home/dell/my_computation/MG5_aMC_v2_6_7/hjj_matching_trial/Events/run_01/PY8_parallelization/run_PY8.sh 1 launch ends with non zero status: 139. Stop all computation
Pythia8 shower jobs: 0 Idle, 3 Running, 1 Done [29 seconds]
Pythia8 shower jobs: 0 Idle, 0 Running, 4 Done [33 seconds]
Command "generate_events run_01" interrupted with error:
Exception : program /home/dell/my_computation/MG5_aMC_v2_6_7/hjj_matching_trial/Events/run_01/PY8_parallelization/run_PY8.sh 3 launch ends with non zero status: 139. Stop all computation
Please report this bug on https://bugs.launchpad.net/mg5amcnlo
More information is found in '/home/dell/my_computation/MG5_aMC_v2_6_7/hjj_matching_trial/run_01_tag_1_debug.log'.
Please attach this file to your report.
INFO: storing files of previous run
INFO: Done
INFO:
quit
INFO:

Please suggest what to do in this regard.

Thanks,
 Antara

Question information

Language:
English Edit question
Status:
Answered
For:
MadGraph5_aMC@NLO Edit question
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Last query:
2020-05-27
Last reply:
2020-05-27

My suggestion would be to contact Stefan Prestel.

Cheers,

Olivier

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