This set of simple programs parses .lhe files into .root files for given processes.
First to compile the parsers do,
source build.sh
Then run e.g. the undecaying A' parser with
./lhetree_Ap.exe <input LHE file> <output root filename> <xsec> <# events>
Alternatively, one can also just do source lhesnip.sh </path/to/lhe/file/.lhe> assuming that the .lhe is contained in the following directory structure with respect to the script: ../dir1/modeldir/Events/run_01/unweighted_events.lhe