The instructions to generate the process are detailed in arXiv:2008.06364

0) Please refer to the paper for downloading the plugin.

1) run mg5_aMC, using the command

path_to_MG5_aMC/bin/mg5_aMC --mode=MG5aMC_PWG

Then, inside mg5_aMC, give the following commands:

import model HC_NLO_X0_UFO-heft

generate p p > x0 j j / t [QCD]

output "directory_where_the_code_by_MG_is_created"


Now the are two possible ways to proceed:

*******************
     FIRST WAY
*******************

2) svn checkout the X0jj directory from the User-Processes-V2 repository

svn co svn://powhegbox.mib.infn.it/trunk/User-Processes-V2/X0jj  ./"X0jj_svn_directory"


3) replace all the files in the "directory_where_the_code_by_MG_is_created"
with the files from the svn directory "X0jj_svn_directory"


*******************
    SECOND WAY
*******************

Alternatively, in "directory_where_the_code_by_MG_is_created", run the script

clean_BEFORE_svn.sh

and then checkout the X0jj repository with

svn co svn://powhegbox.mib.infn.it/trunk/User-Processes-V2/X0jj ./

In this way, there is just a single directory, called
"directory_where_the_code_by_MG_is_created", where the modified files are
already under svn


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Please refer to the README file for further instructions and indications.