Parity is maximally violated in weak interactions, specifically in W boson interactions, while Z bosons couple to both left and right-handed particles, indicating that parity is not maximally violated in their case. The electroweak symmetry breaking results in W bosons becoming massive while the Z boson and photon emerge from the mixing of the unbroken symmetry components. This phenomenon highlights the unique characteristics of weak interactions, particularly the distinction between charged and neutral currents. The term "maximally violated" originated 50 years ago, referring to the equal parts of vector (V) and axial vector (A) interactions observed in charged current weak interactions.
PREREQUISITESParticle physicists, students of quantum field theory, and anyone interested in the fundamental interactions of particles and the implications of symmetry in physics.
The term "maxilmally violated" arose 50 years ago because the charged current weak interactions, which were the only ones seen for a long time, had equal parts of V and A.touqra said:Why do they always say parity is maximally violated in weak interaction? This is true for W boson interactions. But not for Z bosons, as the Zs couple to both left and right handed particles. And hence, is not maximally violated in the case of Z.