I don't know if this is the best forum for my question, hopefully this is not just a lead balloon question. I expect that the statistically least likely events to ever be observed have been observed in a particle accelerator. Does anyone have any idea what takes the award for the statistically least likely event to ever be seen and to have been seen goes to? Particle accelerators are engineered to make very unlikely events much more likely, so maybe I am just asking what the effectiveness of the accelerator is and how lucky we have been with that effectiveness. I labelled the question B, I am a bit self-conscious that it may be a nonsense question.