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Here we can collect useful information on how the codes and libraries needed for the project have to be installed.

CheckMATE

The website contains a very useful Installation tutorial which also goes through the installation of the dependencies, which are python, ROOT, Delphes, HepMC2 (not version 3!!!), MG5 (aka MadGraph) and Pythia. For most of these packages, the CheckMATE tutorial can be followed one-to-one.

ROOT

For the ROOT installation, the CheckMATE instructions are a bit outdated. ROOT now uses cmake. On my (Tim) linux computer I did it this way:

1) Download source file (tar.gz) of the latest stable version from website:
https://root.cern.ch/downloading-root
2) Run
tar xvzf root_v6.XX.XX.source.tar.gz
which unpacks the source files into a source directory.
3) create a root build directory, e.g.
mkdir /home/username/codes/root_v6.XX.XX
4) cd to the build directory. Then run:
cmake -Dminuit2=ON -Dfftw3=OFF -Dcxx11=ON /path/to/source/code/
5) then run
cmake --build . target VDT
[if the above doesn't work, try: "cmake --build . --target VDT]
cmake --build .
6) Do something else until everything is finished (takes long!).
7) Add the following to your .bashrc file:
source /path/to/build/directory/bin/thisroot.sh
8) Restart the terminal, and then try
root
9) If root starts, you are done!


MG5

One can follow the CheckMATE instructions for the MG5 installation directly. However, in our projects, we need to simulate the process gg > H in the MSSM, which is not implemented in the standard MSSM model files of MG5 per default. A model implementation for this is the package aMCSusHi, which however requires a specific MG5 version (currently, version 2.4.3). Emanuele also has his own implementation of the process gg > H in the MSSM. NEED TO FIGURE OUT HOW TO SET THIS UP!

aMCSusHI : 

1. Make sure you've built sushi linked to feynhiggs

2. Setup ggH model (not accurate, but matrix elements will be overridden)

- go into MG5_aMC folder
> cd /path/to/MG5_aMC/MG5_aMC_v2_X_X

- start MG5_aMC by typing
> ./bin/mg5_aMC

- continue with the following steps:
MG5_aMC>import model heft-no_b_mass
MG5_aMC>define p = p b b~
MG5_aMC>generate p p > h [real=QCD]
MG5_aMC>output ggH
MG5_aMC>exit

3. Install amcSUSHI

./set_up_ggH_MSSM_script.pl /usr/lib/mg5/ggH /usr/lib/feynhiggs/x86_64-Linux/lib64 /usr/lib/sushi/lib

4. Test that everything is working together:

inside the ggH directory : "./bin/generate_events" -> "[enter]" -> "[enter]"
Keep a close eye on the event generation process -> there are many different steps
and hopefully all complete without error.


[if you have issues relating to pyermm_ try:
a. edit the file ggh/MCatNLO/srcHerwig/madfks_hwdriver.f by adding the following at the end:

"
c dummy routines for stdhep
SUBROUTINE PYERRM(MERR,CHMESS)
implicit none
integer MERR
CHARACTER CHMESS*(*)
write(*,*)'dummy PYERRM should never be called from HW6'
stop
end


FUNCTION PYCOMP(KF)
implicit none
integer KF,PYCOMP
write(*,*)'dummy PYCOMP should never be called from HW6'
stop
end
"


from https://answers.launchpad.net/mg5amcnlo/+question/650962 with fixed fortran code extracted from
newer MG versions under /templates/MCatNlo....


b.


install pythia-pgs for pythia compatability - i.e. try and run:
./bin/<Mad graph> then do "install pythia-pgs"
otherwise manual install via https://github.com/HEPcodes/pythia-pgs

For learning to use MadGraph, there are useful tutorials on the web, e.g. by CMS (web link).

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