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In quantum mechanics and particle physics, parity is a discrete symmetry that involves the inversion of spatial coordinates: ((x, y, z) \rightarrow (-x, -y, -z)). For a particle, the parity operator (P) acts on its wavefunction (\psi(\mathbf{r})) such that (P\psi(\mathbf{r}) = \psi(-\mathbf{r})). Particles can either have even parity ((+1)) or odd parity ((-1)), which determines how their wavefunctions behave under spatial inversion. Defining an intrinsic parity for each particle is necessary because parity is a conserved quantity in strong and electromagnetic ________ _______ ______ ________ ________ ____.
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