{"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 differences in energy distributions when different particles are emitted.", "specific_scope": "The comparison is made between two decay processes: one that emits two lighter particles (E and V) and another that emits one exotic massless particle (M) instead of the two lighter particles (V).", "goal": "Determine how the change in emitted particles affects the energy spectrum of the outgoing E particles."}, "summary": "In this problem, we analyze the energy spectrum of particles resulting from two different nuclear decay processes. The first decay emits two lighter particles (E and V), resulting in a continuous energy spectrum with a certain endpoint. The second decay emits one massless particle (M) instead of the two lighter particles (V). The goal is to understand how this change affects the energy spectrum of the outgoing E particles. The correct answer is that the spectrum remains continuous with an adjusted shape, and the endpoint increases, as the massless particle allows for more energy to be distributed among the emitted particles."}