LHE-scripts

Python scripts that read Les Houches Event (LHE) files and create plots

Setup

git clone https://github.com/nplastir/LHE-scripts.git

Usage

• Step 1: Read LHE file and convert it in a ROOT tree

python3 LHEReader.py --input input.lhe --output output.root

• Step 2: Read ROOT tree and create plots

python3 LHEplots.py --input output.root --output [DIRECTORY]

Example

python3 LHEReader.py --input example.lhe --output example.root

Running this, will create a root file example.root. Then, simply run

python3 LHEplots.py --input example.root --output example

which will create a directory (if does not already exist) called example where will be created some plots in .png format.

Batch conversion

If you have multiple files that you want to convert into ROOT files:

• Create a folder where you will transfer all the .lhe files that you want to process.
• Run ./batch_convert.sh [DIRECTORY] where the [DIRECTORY] is the argument for the input folder.
• This script will then create, according to the input folder name, a directory to store all the ROOT files, will merge them and then create a directory with all the plots.

Info

The script LHEplots.pyis a very simple script that plots only the basic variables from the LHE file. For more complex examples, refer to the scripts inside the tt+bb folder, which contain scripts for the three decay channels of the tt+bb process.