Comment 6 for bug 1900239

Since we do not do the hadronization, it really matters of the parton-shower code that you use for the hadronization. So clearly if you use Pythia the answer is no (and in general the answer should be no since you have pion which are coming from both quark)

Cheers,

Olivier

> On 17 Oct 2020, at 17:10, Diogo Franco Graça Pires <email address hidden> wrote:
>
> Dear Olivier,
>
> Thanks for the quick replies.
>
> I have a question if you'll allow me to ask it here:
>
> Supposing a generated a simple "e+e- > jj" event. Would it be possible
> to use MadGraph in order to trace back a given hadron (from one of the
> jets) to its correspondent original quark? For instance, if from this
> event I had two jets, and a given pion belonged to one of the jets, is
> there a way to find out if this pion "came from" the quark or the
> antiquark?
>
> PS: I should tell you as well that through Pythia alone this is not
> possible by design.
>
> Thank you for your help!
>
> Diogo
>
> --
> You received this bug notification because you are subscribed to
> MadGraph5_aMC@NLO.
> https://bugs.launchpad.net/bugs/1900239
>
> Title:
> MadGraph Tutorial "run output" Error
>
> Status in MadGraph5_aMC@NLO:
> Fix Released
>
> Bug description:
> Hi!
>
> I am on a Mac and just downloaded MadGraph and started the tutorial.
> While on the 3rd step "c) How to run the MadEvent output", I encountered this error:
>
> ******************
>> done
> INFO: Update the dependent parameter of the param_card.dat
> Generating 10000 events with run name run_01
> survey run_01
> INFO: compile directory
> compile Source Directory
> Using random number seed offset = 21
> INFO: Running Survey
> Creating Jobs
> Working on SubProcesses
> INFO: P1_gg_ttx
> Error detected in "generate_events run_01"
> write debug file /Users/diogopires/Desktop/MG5_aMC_v2_8_1/MY_FIRST_MG5_RUN/run_01_tag_1_debug.log
> If you need help with this issue please contact us on https://answers.launchpad.net/mg5amcnlo
> str : A compilation Error occurs when trying to compile /Users/diogopires/Desktop/MG5_aMC_v2_8_1/MY_FIRST_MG5_RUN/SubProcesses/P1_gg_ttx.
> The compilation fails with the following output message:
> gfortran -O -w -fbounds-check -fPIC -ffixed-line-length-132 -w -c symmetry.f -I../../Source/
> gfortran -O -w -fbounds-check -fPIC -ffixed-line-length-132 -w -c idenparts.f -I../../Source/
> gfortran -o gensym symmetry.o idenparts.o -L../../lib/ -lmodel -lgeneric -lpdf -lc++ -mmacosx-version-min=10.8
> ld: library not found for -lc++
> collect2: error: ld returned 1 exit status
> make: *** [gensym] 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
> quit
> ******************
>
> How can proceed in order to solve this?
>
> Thank you for your help!
>
> Diogo
>
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