Understanding MoMEMta examples and MoMEMta-MaGMEE #3
Description
Hi @swertz @FlorianBury. I have a question that by definition is going to be pretty dumb RE: using MoMEMta and MoMEMta-MaGMEE that will probably be obvious once I have time to reread the "In depth sections of https://momemta.github.io/ and https://arxiv.org/abs/1805.08555 and https://arxiv.org/abs/2008.10949. (Or maybe I'm confused on the Lua configuration process.)
If this doesn't make, please ask for clarification as I'm writing this Issue somewhat quickly.
How does one practically go from the MadGraph5 process and building the matrix elements with MoMEMta-MaGMEE to producing simulated events to the computation of weights?
The examples that are given in the tutorial repo (c.f. run_ttbar_tutorial.sh) start out with provided MatrixElements and a simulated event file to read in (Tutorials/TTbar_FullyLeptonic/tt_20evt.root). That all works fine, and those simulated events are generated using MG5_aMC@NLO, Pythia and Delphes.
However, as a starting example, I'd like to be able to start with just the MadGraph5 process and have MoMEMta-MaGMEE produce the matrix element
generate p p > l+ l-
output MoMEMta pp_drell_yan
if I want to be able to use MoMEMta with these matrix elements it isn't clear to me the in between steps required. Would I need to take that same MadGraph5 generation
generate p p > l+ l-
and then produce all the simulated events with the toolchain and then come back and have MoMEMta use that same generation process in combination with MoMEMta-MaGMEE to have MoMEMta know what was done?
I think this is probably rambly enough to have lost any clarity, but I guess I'm missing the connecting step of the requirements on event simulation and connecting simulation back to MoMEMta.