{"knowledge_schema": {"broad_category": "Physics \u2192 Particle Physics \u2192 Particle Interactions", "refinement": "This problem involves the annihilation of a proton and an antiproton, leading to the production of new particles, and requires an understanding of energy conservation and relativistic speeds.", "specific_scope": "The focus is on calculating the speed of the produced particles (A\u207a and A\u207b) after the annihilation event, given the rest mass energy of particle A and the initial conditions of the reaction.", "goal": "Determine the speed of particle A after the annihilation process, using principles of energy conservation and relativistic dynamics."}, "summary": "This problem is rooted in particle physics, specifically the annihilation of a proton and an antiproton, which produces new particles. The task is to calculate the speed of the produced particles (A\u207a and A\u207b) based on the rest mass energy of particle A and the initial conditions of the reaction. By applying the principles of energy conservation and relativistic dynamics, we can determine that the speed of particle A is 0.77c."}