# Particle physics. Machine learning. ATLAS.

# Simple anomaly detection: auto-encoders

A very simple case study to show the limits of discriminator networks in searching for new processes (make parallels with high energy particle physics if you wish!) and an equally simple setup for anomaly detection.

# QCD without the top quark? (Part 2)

Some time ago I wrote about doing QCD without the top quark. Now we go one step further and consider weak interactions.

# PHY421 Electron-Positron annihilation using trace techniques

These are notes for a PHY421 tutorial, essentially mirroring the discussion in Thomson’s Modern Particle Physics (middle sections of chapter 6), to complement the derivation (in terms of the explicit spinors and Clifford representations) in Prof. Costanzo’s lecture notes.

# My very first hackathon!

Today, as part of the ATLAS Software & Computing Week - a long series of meetings where virtually every working group involved to some degree in the compsci affairs of ATLAS present their latest developments, brainstorm, set deadlines and consume gargantuan amounts of coffee - I was involved in a hackathon. Which I think is pretty cool (but maybe that’s just me).

# PHY421 Particle decays and cross sections

These are notes from a PHY421 tutorial I gave today, essentially mirroring the discussion in Thomson’s Modern Particle Physics (first few sections of chapter 3) and in Prof. Costanzo’s lecture notes.

# PHY421 A word about the Dirac delta-function

There are already probably too many articles on the Dirac delta-function out there, but see if I care… More seriously, the following notes will just point out a few aspects of the famous function that might come in handy to the budding particle physicist.

# PHY251 Gaussians in Quantum Mechanics

Since this week’s QM problem sheets involves Gaussian integrals, I thought it might be a good idea to derive a few results of interest, rather than just stating them.