{"knowledge_schema": {"broad_category": "Physics \u2192 Nuclear Physics \u2192 Particle Decay", "refinement": "This problem examines the energy spectrum of particles resulting from nuclear decay processes, specifically focusing on the emission of lighter particles and the effects of changing decay products.", "specific_scope": "The analysis compares the energy spectrum of outgoing particles in two different decay scenarios: one with two massless particles and one with one exotic massless particle.", "goal": "Determine how the change in decay products affects the energy spectrum of the emitted particles."}, "summary": "In this problem, we analyze the energy spectrum of particles emitted during a nuclear decay process. The original decay emits two massless particles, resulting in a continuous energy spectrum for the outgoing particles. When one of the massless particles is replaced with an exotic massless particle, the energy spectrum remains continuous but adjusts in shape, leading to an increase in the endpoint value. This indicates that the total energy available for the outgoing particles has increased due to the change in decay products."}