Egamma and other physics objects

Overview

Teaching: 15 min
Exercises: 0 min

Questions

• What are the key aspects in the building of electromagnetic (egamma) and some other physics objects?

Objectives

• Learn the basic notion of egamma (electron and photons) object reconstruction.

• Read a little bit about the reconstruction of other objects

Finding electrons and photons with the CMS detector

In this recent article you can learn about the most basic ideas of electrons and photons reconstruction. It refers mostly to the Run 2 epoch, but worry not because the essential aspects were also true for Run 1 and the open data from that epoch. Read this article and answer the following question in our assignment form.

Question #4: What is known as an electromagnetic shower in CMS?

This was an example of the many objects reconstructed in CMS. In the next episode you will dig a bit deeper into the main reconstruction algorithm used in this experiment.

Other physics objects

To expand your familiarity with physics objects reconstruction, we recommend these short reads on jets and muons.

Key Points

• 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.