Goals of the course

Learning objectives
  • Understand what we'll be doing, and why we'll be doing it.

The first LHCb Starterkit is all about getting you the data you need to do your physics analysis.

We'll start from the very beginning, explaining how proton-proton collisions make their way to long-term storage, and will end with having a ROOT ntuple containing all the variables you might want to look at for making your measurement.

We want this course to give you the confidence to be able to start by yourself, to understand what the code you'll be writing does and why you're writing it, and to teach others how to do the same. Each lesson follows on from the previous one, but each can also serve as a standalone reference when you need to revisit a particular topic.

We'll be looking at:

  • How data flows through the LHCb processing chain, what software is involved, and how the data are stored;
  • How the data flow is different for simulated (Monte Carlo) events;
  • Where the data ends up, how it's indexed, and how you can find and access the data you need;
  • How to get candidate decays from the LHCb data format to ROOT ntuples; and
  • How to add more variables to the ntuples.

We'll also cover how to efficiently run software locally and on the Grid using Ganga, as well as how to ask good questions when you're stuck and where to ask them.

The lessons will start with a lot of explaining, but then we'll get in to the hands-on stuff.

These lessons have been put together by a group of people who are passionate about teaching good software practices and demystifying code. Over the course of 2015, these lessons have been written on GitHub, a code sharing and collaboration website. You can find the source code of these lessons in the lhcb/first-analysis-steps repository, and you can contribute! Please submit an issue if you spot a mistake or you think something isn't clear enough, or you can make the changes yourself and open a pull request. If you're not already familiar with git, you could check out our analysis essentials course.

So, enough with the introduction, let's dive in!


Attribution[edit | edit source]

This material was created by and is copyright of the LHCb Starterkit contributors. It is licensed under the terms of the CC4 BY license. The original material can be found at http://lhcb.github.io/first-analysis-steps