{"knowledge_schema": {"broad_category": "Particle Physics \u2192 Decay Processes \u2192 Kinematic Constraints", "refinement": "This problem involves analyzing the decay channels of a bosonic particle based on its mass and the masses of potential decay products.", "specific_scope": "The focus is on determining which decay processes are kinematically allowed for a boson Y with a mass of 6 GeV.", "goal": "Identify the decay modes of the boson Y that can occur given its mass and the masses of the fermions and bosons involved."}, "summary": "In this problem, we are tasked with determining the kinematically allowed decay processes for a boson Y with a mass of 6 GeV. The decay channels must involve final state particles whose combined mass does not exceed the mass of the boson Y. The correct answer includes decay modes to lighter fermions such as quarks and leptons, which are all below the mass threshold of 6 GeV, making them kinematically possible. The other options involve heavier particles or combinations that exceed this mass limit."}