Feynman Diagrams: Let’s build some! - chapter 3 (High school Physics)

Feynman diagrams are a graphical representation of the processes involved in particle physics reactions. This video is the third episode of a series of three that presents what are Feynman diagrams, how to understand and use them, and how to build them.

In this episode, you will learn how to build your own diagram using conservation laws and rules about forces to decide the various steps that could occur during a particle physics reaction. Learning by example is often the best way: in this video, we will build many Feynman diagrams together. These will be based on particle physics reactions like muon decay, pion decay, Kaon decay etc. Some of these examples are under the form of exercises, so you can train your new skills! Of course, corrections are provided on the white the board.

Feynman diagrams are an insightful tool that puts to light the wonders of particle physics.

The reactions occurring in particle physics are a marvel of processes involving the forces of nature (weak force, strong force and electromagnetic force). Writing these like a chemical reaction does not provide information about the processes involved, just what you start up with, and what you end up with. One can use the Quantum Chromodynamics (QCD) and Quantum Electrodynamics (EOD) to model quite well what is going on, but the mathematics involved is not for everyone!

Instead, graphical representation of these reaction, invented by Richard Feynman, allow all to easily visualize the processes involved: Feynman diagrams. He introduced these originally as a graphical aid for visualizing and calculating interactions between electrons and photons. Today, Feynman diagrams are commonly used to depict all types of particle interactions.

These videos are intended to help high school students with their physics studies as well as high school physics teachers wondering how to approach the topic with their students.

**** Access to the Videos **** Introduction: Content review of the Feynman Diagram mini-series https://youtu.be/O9ihGuK53Ww

Episode 1: What is a Feynman Diagram? (brief overview of Feynman diagrams, using as support a very well-known reaction, beta decay): https://youtu.be/TLBXrMixcu8

Episode 2: Space, Time and Vertices. (Presentation of the building elements of a Feynman diagram: space-time diagrams, the symbolism that is used, and the concept of vertex): https://youtu.be/JScJjZ9zW7A

SUPER USEFUL - The table of particles: https://www.physics-made-easy.com/Standard-Model-of-Particle-Physics

If you are not familiar with Particle physics, I recommend you start by viewing the series of videos that deals in detail with particle physics reactions: _ Introduction: https://youtu.be/gy-durcAhJ4 _ Elementary and composite particles of the standard model: https://youtu.be/A ... https://www.youtube.com/watch?v=vgk2aJRlBcg