Griffiths Introduction to Elementary Particles · Problem 7.16
Electrodynamics of Quarks and Hadrons — David J. Griffiths
Physics — QFT · parity-intrinsic-parity
Problem
Show that the spinor representing an electron at rest [eq. (7.30)] is an eigenstate of the parity operator, P. What is its intrinsic parity? How about the positron? What if you changed the sign convention in equation (7.61) (see ref. 3)? [Notice that whereas the absolute parity of a spin-21 particle is in a sense arbitrary, the fact that particles and antiparticles carry opposite parity is not arbitrary.]