If the transition is more complex, they should see evidence of that more complex mechanism. Alarcon's excitement for his chosen profession is evident as he speaks. Our detectors are much better than they used to be. The fact that we can control spin will give us much better data, better than ever before. In any particle physics experiment, capturing the collision events is always a matter of statistics.
Many electrons pass undisturbed through a target.
Many others create ordinary events that already are well understood. But a few will be different and interesting. Much of the effort expended by experimental physicists is devoted to increasing the number of these interesting events. But they cannot be increased to the point where the detectors become so deluged with particles that nothing can be discerned. Using this technique, the researchers generate a fairly well-spaced flow of events.