Particle Physics For All

    Table of contents  INTRODUCTION  TO  FEYNMAN DIAGRAMS View my previous article here - Gluons View the next article here - Hadrons ----------------------------------------- Feynman diagrams are diagrams that are used to show the interaction among particles .  For e.g., if we had to show the beta minus decay using the Feynman diagram - ( In beta minus decay - a neutron decays to proton and in the process, creates an electron and an electron antineutrino.) Explanation - First, we draw the path of the neutron , which is represented at the bottom left of the image. "u" represents the up quark and "d" represents the down quark. Next, we draw the squiggly line , to show the weak interaction during beta decay. The path shown on the top left shows that of a proton which is a product of beta decay. We also understand that only one of the down quark changes to an up quark. On the top right, we notice an electron emerging , which has been denoted by e-. We also s...