High Quality Content by WIKIPEDIA articles! Pair production refers to the creation of an elementary particle and its antiparticle, usually from a photon (or another neutral boson). For example an electron and its antiparticle, the positron, may be created. This is allowed, provided there is enough energy available to create the pair – at least the total rest mass energy of the two particles – and that the situation allows both energy and momentum to be conserved. Other pairs produced could be a muon and anti-muon or a tau and anti-tau. However all other conserved quantum numbers (angular momentum, electric charge, lepton number) of the produced particles must sum to zero – thus the created particles shall have opposite values of each. For instance, if one particle has electric charge of +1 the other must have electric charge ?1, or if one particle has strangeness +1 then another one must have strangeness ?1. Данное издание представляет собой компиляцию сведений, находящихся в...

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