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Welcome to the LPHY2131 wiki!

This project assembles material for the LPHY2131 lab at UCLouvain. This wiki also documents the three sessions of the laboratory and provides some additional information.

The results that are obtained in this lab can be compared to the published cross-section measurement for the Z and W at the LHC, at 7TeV, by the CMS collaboration: Measurement of the Inclusive W and Z Production Cross Sections in pp Collisions at sqrt(s) = 7 TeV

To install, follow the instructions below:

1. Download the virtual machine from http://opendata.cern.ch/VM/CMS#how

• Increase the RAM to 2GB (optional. The minimum is 1GB)
• Enable 3D acceleration
• after booting, change the keyboard layout (if needed)

2. In a terminal (black icon at the bottom left of the screen), run the following two commands. Note that the second command starts with a dot followed by a space.

• git clone https://github.com/delaere/LPHY2131.git
• . LPHY2131/install.sh

This prepares the environment for the lab:

• downloads samples files and example scripts
• installs CMSSW 4.2.8 (used for 2010 data processing)
• installs CMSSW 7.1.1 (used to setup the analysis environment)
• installs MadGraph 5
• installs Delphes 3.3

Thanks to Liliya Milenska, Gilles Parez and Martin Michel for their help in preparing this activity during their internship in summer 2015. Thanks to Jérôme de Favereau and Michele Selvaggi for their support.