Weak interactions violate parity and charge conjugation symmetry through a Vector-Axial (V-A) current structure, where particle wave functions transform into linear combinations of vector ($\gamma^\mu$) and axial-vector ($\gamma^\mu \gamma^5$) currents that lack definite parity eigenstates. This mechanism dictates maximal parity violation by coupling exclusively to left-handed fermions and right-handed antifermions while conserving the combined CPT symmetry in most weak processes but allowing CP violation through specific meson decay asymmetries mediated by neutral current bosons ($Z^0$, $W^\pm$). The theory operates within Quantum Field Theory as a fundamental domain of particle physics, establishing conservation laws for flavor-specific lepton numbers and defining selection rules distinct from electromagnetic or strong interactions which preserve parity.
Weak interactions violate parity and charge conjugation symmetry through a Vector-Axial (V-A) current structure, where particle wave functions transform into linear combinations of vector ($\gamma^\m…