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Alfie Simpson
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Can someone give me a brief overview of QCD, I'd like to know famous physicists that worked in the field, the main theory's it includes, when did it begin and why do we study it? Thank you.
QCD stands for quantum chromodynamics, which is a theory in quantum physics that describes the strong interaction between quarks and gluons, the building blocks of subatomic particles called hadrons. It is one of the four fundamental forces of nature, along with gravity, electromagnetic, and weak forces.
QCD is essential in understanding the structure and behavior of subatomic particles, such as protons and neutrons, as well as the interactions between them. It also plays a crucial role in the study of nuclear physics and the creation of new particles in high-energy particle accelerators.
The strong nuclear force is responsible for binding quarks together to form protons, neutrons, and other hadrons. QCD explains this force by describing the exchange of gluons between quarks, which creates a strong attraction between them.
QCD and QED (quantum electrodynamics) are both theories in quantum physics, but they describe different forces. QCD deals with the strong interaction between quarks and gluons, while QED deals with the electromagnetic interaction between charged particles. They are both part of the standard model of particle physics.
Color confinement is a principle in QCD that states that quarks cannot exist as free particles, but must be confined within hadrons. This is due to the strong force increasing with distance, making it impossible to separate quarks from each other. QCD explains this phenomenon through the behavior of gluons, which create a "color charge" that holds quarks together.