How to script MG5 run?
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- Last updated by:
- Olivier Mattelaer
In order to script a run.
You have to write a file with all the command that you type. (in that exact order).
Note that
1. You can enter the answer to question as well
2. If you do not provide answer to question, the default value will be assumed.
3. Edition of the param_card/run_card can be scripted via the "set" command of the associate question.
Finally you have to run the script as:
./bin/mg5_aMC PATH_TO_FILE
Here is an example of a script performing a scan on the top mass.
generate p p > t t~ j
output MYDIRECTORY
launch MYDIRECTORY
set mt 170 # changing the top mass
set wt Auto # changing the top width
set ptj 40 # changing the ptj cut
launch
set mt 175 # changing the top mass
set wt Auto # changing the top width
launch
set mt 180 # changing the top mass
set wt Auto # changing the top width
launch MYDIRECTORY -i
Note that
1. The last two command allow you to have a multi-column file with the cross-section/
2. The same can be done with the ./bin/madevent and ./bin/amcatnlo executable .
3. Indentation in the script file is not important
You already have a created directory then you use the ./bin/madevent and/or ./bin/amcatnlo in the same way as the above one.
so you can for example write the following command in a file
launch
madspin=ON
set mt scan:[170,175,180]
set wt Auto
set ptj 40
multi_run 10
madspin=OFF
set mt 175
set wt Auto
set nevents 100k
and then run as
./bin/madevent PATH_TO_FILE
Note for large scan it is more efficient to use the "./bin/madevent" executable rather than the "./bin/mg5_aMC" one