Long-lived stau repository

This repository is to perform the long-lives stau searches at DESY CMS.

Environment installation

Clone package from the github without loading any additional environment (like CMSSW):
```
> git clone -o DESY-CMS-SUSY-TAU -b master --recurse-submodules [email protected]:DESY-CMS-SUSY-TAU/LLStaus_Run2.git
> cd LLStaus_Run2
> git submodule update --init --recursive # Update the submodules
```
Update git to >=2.13 if possible, for --recurse-submodules to work.
Otherwise, use --recursive instead of --recurse-submodules with 1.9<=git<=2.12.
Note that this is needed to clone the submodules (such as pepper).
Go to the directory and setup appropriate environment with setup.sh script:
```
> source setup.sh ENVIRONMENT
```
where supported ENVIRONMENT are:
- NanoAOD_UL2018: step for production of the customized NanoAOD tuples.
- conda: anaconda environment - used for all the analysis except the production of NanoAOD.

Nano Tuple production

See documentation here

Analysis

See documentation here