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Quantum Field Theory and the Standard Model

Quantum field theory (QFT) unifies Einstein's special relativity with quantum mechanics. QFT is the foundation of what physicists refer to as the Standard Model (SM), which is the theoretical framework that describes all known particles and their interactions except gravity. A word of caution on QFT. It is one of the most difficult subjects in science. Quantum mechanics (QM) is based on three things: 1- Physical observable are operators 2- the Uncertainty principle 3- Commutation relations.

However, QM cannot describe particle reactions at relativistic high energy. That is why it is referred to as non-relativistic quantum mechanics (NRQM). Relativity states that: E = mc2......(equation 1)
This equation relates energy to mass. This means that with high enough energy that is proportional to the particle's mass, then by equation 1, we can "create" the particle. Due to conservation laws, we need twice the particle's energy, so that we can create the particle and its…

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