= CPT constraints on particle properties
{c}
In a <CPT>-invariant vacuum, a <subatomic particle> and its <antiparticle> have equal masses and total <decay widths>, equal spin magnitudes and opposite conserved additive charges. <CPT> exchanges initial and final states in a scattering experiment; it relates a process to the reversed process with antiparticles and reversed spins. It does not force equality of every pair of conjugate partial <decay widths> when <CP violation> is present.
Back to article page
