A fundamental particle, atom or molecule with a permanent electric dipole moment must violate it.
A fundamental particle, atom or molecule with a permanent electric dipole moment must violate it. In Hilbert space it is given by an antiunitary operator, and it holds for the Schrödinger equation only if the potential energy is real. A 1995 experiment at CERN observed its violation directly in the semileptonic decays of neutral kaons. FTP, name this symmetry whose violation is linked with CP violation in most theories.
A fundamental particle, atom or molecule with a permanent electric dipole moment must violate it.
{T}ime reversal symmetry (accept {P}arity reversal symmetry before “antiunitary operator”; do not accept {CP} symmetry or {charge-parity symmetry})