Madgraph 2.7.2 vs 3.4.0

Asked by Swagato Banerjee

The following script used to work in version 2.7.2 : |./bin/mg5_aMC script_mu_mu_ISR| where
cat script_mu_mu_ISR
generate e+ e- > mu+ mu-
output EE_ISR e_e_mu_mu_ISR
launch run_card.dat
set lpp1 9
set lpp2 9
set nevents 100000
set iseed 1
What needs to be changed to make it work in version 3.4.0 ?

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Olivier Mattelaer (olivier-mattelaer) said :
#1

Looks like you are using a plugin not develloped by us.
In theory the API did not change so the same should work. If not please contact the author of the plugin (and I can work with them to update their plugin if needed).

Otherwise, for lepton collider, we do have internal method now.
So if you are ok to not use the plugin, and use our implementation (which might not be 100% identical see https://arxiv.org/pdf/2108.10261.pdf for our implementation) then you can use the following instructions:

generate e+ e- > mu+ mu-
output e_e_mu_mu_ISR
launch e_e_mu_mu_ISR
set lpp1 -3
set lpp2 3
set pdlabel isronlyll
set nevents 100000
set iseed 1

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