Contribution Of Cosmic Muons in HCAL Signal

Purpose of the study

We want to develop a method to study the contribution of cosmic muons in HCAL signal. Plan is to use the cosmic run data collected during Long Shut Down.

We would like to reconstruct the cosmic muons inside the HCAL detector and calculate its contribution in the signal. These numbers ultimatily will be used in

exotica analysis. The ultimate purpose of the study is to find out the effects of cosmic muons during the collision where it can mimic a real hadron signal.

Our goal is to look for the fraction of muon shower in the event and eventually estimate the this background in real data.

Useful resources

CMS detector note for HCAL pdf

Two basic tutorials for reading Reco and Digi data page

Basic Code

A basic code a developed by Dr. Gobinda Majumdar. It can be found at


It is now being developed more by Vineet. A working version is


Data Sets


These are the list of cosmic runs which are collected in February are


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Topic revision: r2 - 2015-05-21 - VineetKumar
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