Week 2: Data Formats and Exploration¶

Topics¶

This week’s assignments will guide you through the following topics:

Particle physics data format (ROOT)
Exploring/manipulating the data in Python

Reading¶

Please read/skim the following:

Datasheet from CERN Open Data: Ref. [3]
Awkward arrays: Ref. [4]

Tasks¶

Complete the following tasks:

Run through the notebook 02-dataset.ipynb
Repeat the exercise with tracks using secondary vertices instead (i.e. find out how many secondary vertices there are per jet, plot their pT, and convert it to a regular zero-padded array).
For more details on uproot and awkard arrays watch https://www.youtube.com/watch?v=WlnUF3LRBj4 or run through the SciPy 2020 tutorial: https://github.com/jpivarski-talks/2020-07-13-pyhep2020-tutorial

Weekly Questions¶

Answer the following questions on Canvas:

What is a tree?
What is the difference between a jagged/awkward array and a regular array? Why is this a useful concept in particle physics?

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Week 1: Introduction to Particle Physics and Jets

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Week 2 Notebook: Data Formats and Exploration