PHYS 180 Lecture Notes - Lecture 17: Grand Unified Theory, Subatomic Particle, Fundamental Interaction
Document Summary
As you go back in temperature or as you go in higher temperatures, the four fundamental forces all merge into one particular force. As we go to higher temperature all of physics merges into a grand unified theory. The strong and weak forces are both forces that happen at the subatomic particle scale. Weak forces is usually understood in terms of decay of particles. We live in a low energy reason where the four different forces have split. As we go back in time, the temperature of the universe goes up. All the energy is squished, the universe is dense and hot. The early eras aredefined by thetypes of forces present in the universe. Later eras defined by the types of particles present in the universe. We tart to have this particular subatomic particle raction going on. The universe itself has been a big ball of energy.
