Glossary

Key Points

Introduction	Basic information about physics objects in CMS can be found in the Cern Open Data portal site. A set of questions need to be answered in our assignment form.
The CMS detector	The CMS detector is a complex machine with multiple subsystems and technologies dedicated to identify/build physics objects.
Egamma and other physics objects	Egamma physics objects are built using information from the tracking system as well as the ECAL subdetector. It is a vivid example of physics objects reconstruction.
The Particle Flow algorithm and reconstruction of other objects	The PF algorithm aims at reconstructing and identifying all stable particles in the event, which can be later used to build other physics objects.

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