This is illustrated in the left panel in Figure \PageIndex{6}:. In Feynman’s view, this process is equivalent to the scattering of an A particle backward in time by a B particle, the scatt...This is illustrated in the left panel in Figure \PageIndex{6}:. In Feynman’s view, this process is equivalent to the scattering of an A particle backward in time by a B particle, the scattering of an \bar{A} backward in time by a B particle, the creation of an \bar{AA} pair moving backward in time by a \bar{B} particle (an antiB), and the emission of a B particle by an A particle moving forward in time.
