Pileup modeling and corrections

Prerequisites

In order to complete this lesson you need

Helpline

Instructions written by Anniina Kinnunen (University of Helsinki) Santeri Laurila (CERN). All example code we use is written by Anniina Kinnunen and Stefan Wunsch (CERN). For questions, please contact Santeri Laurila (firstname.lastname@cern.ch).

Welcome! This lesson will familiarize you with the concept of pileup and explain how to derive and use so-called pileup corrections to ensure correct pileup modeling in your analysis. We will demonstrate this by applying pileup corrections in the Higgs to tau tau analysis example.

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Input data

The data used in this lesson are in pre-processed “NanoAOD” datasets. The method to access them will be explained during the exercise itself.

Schedule

Setup Download files required for the lesson
00:00 1. Introduction What is pileup? Why should we care about it?
00:00 2. What is pileup and how to model it correctly? What do we exactly mean by pileup?
How is pileup modelled in simulations?
Why we need pileup corrections and how to derive them?
00:10 3. Adding pileup corrections in the HTT analysis example How to apply the pileup corrections in a specific analysis?
00:40 4. Summary & discussion What did we actually just do?
00:50 Finish

The actual schedule may vary slightly depending on the topics and exercises chosen by the instructor.