What is the purpose of the wave function renormalization in Quantum Field Theory?

A. To remove the infinite self-energy of particles. B. To introduce the concept of antiparticles. C. To ensure the Lorentz invariance of the theory. D. To account for the spin-statistics theorem.

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Explanation

Wave function renormalization is a process in Quantum Field Theory that removes the infinite self-energy of particles, making the theory finite and well-defined.

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What is the purpose of the wave function renormalization in Quantum Field Theory?