Most physical laws do not change if coordinates invert through origin or reflect through plane {parity, physics}|, to change right-handed into left-handed, because most particles do not have handedness. Parity conserves in electromagnetic and strong nuclear forces but not in weak nuclear force, because neutrinos, pions, and kaons have odd intrinsic parity. Other particles, including all zero-rest-mass particles, have even intrinsic parity and no handedness. Parity violation is greater for charged particles, compared to uncharged ones.
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Date Modified: 2022.0224