mjj cut in NLO process

Asked by Yue Xu

Dear MagGraph team,

I want to generate the NLO VBF process: pp > h5pp j j [QCD], where h5pp is a doubly-charged Higgs boson, and apply some jet cuts e.g. mjj, ptj1min, ptj2min. But I noticed the mjj, ptj1min and ptj2min are only in the default run_card.dat of LO process but not NLO process. In the NLO process, there are only ptj and eatj cuts in the run_card.dat. I tried to add the mjj cut to NLO run_card.dat manually with "500 = mmjj", I got errors:
"
Command "launch " interrupted with error:
MadGraph5Error : A compilation Error occurs when trying to compile /home/storage0/users/xuyue/Software/MG5_aMC_v2_7_3/test_GM_UFO_nlo_ssWW/GM_UFO_nlo_H5ppjj_production_cut/Source.
 The compilation fails with the following output message:
     gfortran -O -fno-automatic -ffixed-line-length-132 -c alfas_functions.f
     gfortran -O -fno-automatic -ffixed-line-length-132 -c -o setrun.o setrun.f
     run_card.inc:151.10:
         Included at setrun.f:41:

           MMJJ = ' 500.0 '
               1
     Error: Symbol 'mmjj' at (1) has no IMPLICIT type
     run_card.inc:153.13:
         Included at setrun.f:41:

           MMJJMAX = -1.0000000000D+00
                  1
     Error: Symbol 'mmjjmax' at (1) has no IMPLICIT type
     make: *** [setrun.o] Error 1

 Please try to fix this compilations issue and retry.
 Help might be found at https://answers.launchpad.net/mg5amcnlo.
 If you think that this is a bug, you can report this at https://bugs.launchpad.net/mg5amcnlo
Please report this bug on https://bugs.launchpad.net/mg5amcnlo
More information is found in '/home/storage0/users/xuyue/Software/MG5_aMC_v2_7_3/test_GM_UFO_nlo_ssWW/GM_UFO_nlo_H5ppjj_production_cut/run_02_tag_1_debug.log'.
Please attach this file to your report.
"

Is there a way to apply the mjj cut in the NLO process?

Many thanks,
Yue

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Olivier Mattelaer (olivier-mattelaer) said :
#1

Olivier Mattelaer suggests this article as an answer to your question:
FAQ #3323: “How to implement new cuts”.

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