On Concept of Parity for a Fermion
Abstract
The known problem of fermion parity is considered on the base of investigating possible linear single-valued representations of spinor coverings of the extended Lorentz group. It is shown that in the frame of this theory does not exist, as separate concepts, P-parity and T-parity for a fermion, instead only some unified concept of (PT)-parity can be determined in a group-theoretical language.
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