{"knowledge_schema": {"broad_category": "Physics \u2192 Quantum Field Theory \u2192 Symmetry Breaking", "refinement": "This topic deals with the concept of chiral symmetry and its breaking in the context of particle physics and nuclear matter.", "specific_scope": "The focus is on identifying particles that are associated with the phenomenon of broken chiral symmetry, particularly in the context of strong interactions and nuclear forces.", "goal": "To determine which particle among the given options is linked to the breaking of chiral symmetry in nuclear matter."}, "summary": "In the context of quantum field theory and nuclear physics, broken chiral symmetry is a significant concept. Among the options provided, pions are the particles that are associated with this phenomenon. They emerge as the Goldstone bosons resulting from the spontaneous breaking of chiral symmetry in the strong interaction, making them crucial in understanding the dynamics of nuclear matter."}