NLO for p p > z j, z > l+ l-

Asked by kamuran

Dear Experts,

I am trying to generate events for the physics process p p > z j, z > l+ l- at MadGraph. I have two questions about this.
1-) I tried to calculate cross section of this process at NLO adding [QCD] at the end of the line, but it did not compile. Could you please let me know how I can do this at NLO for this process?
2-) at LO, the process gives the following error. Could you please help me fix this?
Best regards,
Kamuran

Failed to access python version of LHAPDF: If the python interface to LHAPDF is available on your system, try adding its location to the PYTHONPATH environment variable and theLHAPDF library location to LD_LIBRARY_PATH (linux) or DYLD_LIBRARY_PATH (mac os x).
INFO: can not run systematics since can not link python to lhapdf
store_events
INFO: Storing parton level results
INFO: End Parton
reweight -from_cards
INFO: split the event file in bunch of 5000 events
INFO: Idle: 2, Running: 0, Completed: 0 [ current time: 21h25 ]
INFO: Idle: 0, Running: 1, Completed: 1 [ 5.7s ]
INFO: Collect and combine the various output file.
Command "generate_events run_01" interrupted with error:
IOError : [Errno 2] No such file or directory: '/afs/cern.ch/work/k/kdilsiz/private/MADGRAPH5/MG5_aMC_v2_5_4/test/Events/run_01/unweighted_events.lhe.gz_0.lhe'
Please report this bug on https://bugs.launchpad.net/mg5amcnlo
More information is found in '/afs/cern.ch/work/k/kdilsiz/private/MADGRAPH5/MG5_aMC_v2_5_4/test/run_01_tag_1_debug.log'.
Please attach this file to your report.

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Olivier Mattelaer (olivier-mattelaer) said :
#1

Dear Kamuran,

> 1-) I tried to calculate cross section of this process at NLO adding [QCD] at the end of the line, but it did not compile. Could you please let me know how I can do this at NLO for this process?

This process can not be done (like that @NLO), the solution is to do p p > z j @NLO and then use MadSpin to make the decay of the Z

> 2-) at LO, the process gives the following error. Could you please help me fix this?

The problem seems related to the re-weighting module. What re-weighitng did you ask?
If you run with the executable with the flag --debug you might get more information about that problem.

Cheers,

Olivier

> On 5 Apr 2017, at 21:43, kamuran <email address hidden> wrote:
>
> New question #612243 on MadGraph5_aMC@NLO:
> https://answers.launchpad.net/mg5amcnlo/+question/612243
>
> Dear Experts,
>
> I am trying to generate events for the physics process p p > z j, z > l+ l- at MadGraph. I have two questions about this.
> 1-) I tried to calculate cross section of this process at NLO adding [QCD] at the end of the line, but it did not compile. Could you please let me know how I can do this at NLO for this process?
> 2-) at LO, the process gives the following error. Could you please help me fix this?
> Best regards,
> Kamuran
>
> Failed to access python version of LHAPDF: If the python interface to LHAPDF is available on your system, try adding its location to the PYTHONPATH environment variable and theLHAPDF library location to LD_LIBRARY_PATH (linux) or DYLD_LIBRARY_PATH (mac os x).
> INFO: can not run systematics since can not link python to lhapdf
> store_events
> INFO: Storing parton level results
> INFO: End Parton
> reweight -from_cards
> INFO: split the event file in bunch of 5000 events
> INFO: Idle: 2, Running: 0, Completed: 0 [ current time: 21h25 ]
> INFO: Idle: 0, Running: 1, Completed: 1 [ 5.7s ]
> INFO: Collect and combine the various output file.
> Command "generate_events run_01" interrupted with error:
> IOError : [Errno 2] No such file or directory: '/afs/cern.ch/work/k/kdilsiz/private/MADGRAPH5/MG5_aMC_v2_5_4/test/Events/run_01/unweighted_events.lhe.gz_0.lhe'
> Please report this bug on https://bugs.launchpad.net/mg5amcnlo
> More information is found in '/afs/cern.ch/work/k/kdilsiz/private/MADGRAPH5/MG5_aMC_v2_5_4/test/run_01_tag_1_debug.log'.
> Please attach this file to your report.
>
>
> --
> You received this question notification because you are an answer
> contact for MadGraph5_aMC@NLO.

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