{"knowledge_schema": {"broad_category": "Physics \u2192 Quantum Field Theory \u2192 Effective Field Theories", "refinement": "This problem pertains to the symmetries that must be preserved in the Standard Model Effective Field Theory (SMEFT), which describes physics beyond the Standard Model.", "specific_scope": "The focus is on identifying the fundamental symmetries that all operators in the SMEFT must adhere to in order to be consistent with the principles of quantum field theory.", "goal": "Determine which symmetry is essential for the operators in SMEFT to maintain."}, "summary": "In the context of the Standard Model Effective Field Theory (SMEFT), it is crucial for all operators to maintain certain symmetries to ensure consistency with the underlying principles of quantum field theory. Among the candidates provided, Lorentz invariance is identified as an essential symmetry that all operators in SMEFT must uphold. This reflects the requirement that physical laws remain the same under Lorentz transformations, which is fundamental to the framework of relativistic quantum field theories."}