Hi I have a question about a popular science article from BBC, you can ofcourse read the whole article but the part that left me wondering was his which I quoted right here. """Prof Ting said that in its first 18 months of operation, AMS had witnessed 25 billion particle events. Of these, nearly eight billion were fast-moving electrons and their anti-matter counterparts, positrons""" So how come the detector detect electrons and positrons if positron is the electron's antiparticle , how come the positron hasn't already annihilated with the electron after they were produced , how did they came so long way being separate to enter the detector? And when they enter or before they enter how come the detector distinguish them as they would probably annihilate each other in the moment of detection? Ok share your thoughts.