This week's assignments will guide you through the following topics:
- Particle physics data format (ROOT)
- Exploring/manipulating the data in Python
Please read/skim the following:
- Datasheet from CERN Open Data: Ref. {cite:p}
opendata - Awkward arrays: Ref. {cite:p}
Pivarski:2020qcb
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
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?