Wednesday, March 21, 2018

quantum field theory - Spin-Statistics Theorem (SST)


Please can you help me understand the Spin-Statistics Theorem (SST)? How can I prove it from a QFT point of view? How rigorous one can get? Pauli's proof is in the case of non-interacting fields, how it will be in the presence of interacting fields? The origins of the minus sign, when swapping the wave-function, it implies the CPT theorem in play (spinors, anti-articles)?




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classical mechanics - Moment of a force about a given axis (Torque) - Scalar or vectorial?

I am studying Statics and saw that: The moment of a force about a given axis (or Torque) is defined by the equation: $M_X = (\vec r \times \...