Quantum Field Theory
The chiral anomaly is a phenomenon in quantum field theory where a classical symmetry, specifically chiral symmetry, fails to be preserved at the quantum level. This breakdown leads to significant consequences in particle physics, particularly in the behavior of fermions and their interactions, especially in the context of quantum chromodynamics (QCD). The chiral anomaly reveals deep connections between gauge theories and topology, and plays a critical role in the understanding of conservation laws in particle physics.
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