Vertex Reconstruction Overview

When antihydrogen annihilates, it typically produces 2-4 charged pions, which travel through the detector and leave behind a trail of hits.

The challenge is to infer the origin point of these tracks i.e. the location of the annihilation.

In traditional reconstruction pipelines, this is done using geometry-based algorithms that:

• Identify clusters of hits.
• Attempt to form tracks.
• Fit back to a common origin.

In this tutorial, you'll work with a deep learning-based approach:

• We provide you with a working model that predicts the z-coordinate of the vertex directly from a cloud of hits.
• You'll explore how this model works and then experiment with ways to make it better.

By the end of the tutorial, you'll have applied meaningful improvements to a real-world ML system used in fundamental physics research.