NATS 1740 Chapter Notes -Grand Unified Theory, Electroweak Interaction, Planck Units

• School: York University
• Department: Natural Science
• Course: NATS 1740
• Professor: Tatiana Paulin

Document Summary

Lesson 20: cosmology, part 1: the big bang. Matter-antimatter annihilation: an event that occurs when a particle of matter and a particle of antimatter meet and convert all of their mass-energy to photons. Antimatter: any particle with the same mass as a particle of ordinary matter but whose other basic properties, such as electrical charge, are precisely opposite. Electroweak force: the force that exists at high energies when the electromagnetic force and the weak force exist as a single force. Grand unified theory (gut): a theory that unifies three of the four fundamental forces the strong force, the weak force, and the electromagnetic force (but not gravity) in a single model. Planck era: the era of the universe prior to the plank time. Gut era: the era of the universe during which only two forces operated (gravity and the grand unified theory, or gut force) lasting from 10(-43) second to 10(-38) second after the big bang theory.