MadGraph5_aMC@NLO

Error message while launching

Asked by Christina Karagianni

Hello,

after I set at the run_card lpp and lpp2 to 1 the following error appears after launching

Error when reading /home/christina/Programs/MG5_aMC_v2_6_3_2/ZZ0/SubProcesses/P1_zz_ll/G1
Command "generate_events run_02" interrupted with error:
ValueError : need more than 5 values to unpack
Please report this bug on https://bugs.launchpad.net/mg5amcnlo
More information is found in '/home/christina/Programs/MG5_aMC_v2_6_3_2/ZZ0/run_02_tag_1_
Please attach this file to your report.

with no PDFs it MG works.

What's the problem exactly?

Thanks,
Christina

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Olivier Mattelaer (olivier-mattelaer) said : 		#1

In order to "hope" to have a non zero result, you would at least need a PDF containing the Z boson in the initial state.
So which PDF are you using?

If you have a valid PDF, it is even likely that we do not support such type of particle in initial state. ( Additionally, DGLAP equation assumes particles to be massless which is not the case for the Z boson...

Cheers,

Olivier

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