= Crossing (physics)
{wiki=Crossing_(physics)}
In physics, "crossing" typically refers to a specific phenomenon in the context of quantum mechanics or scattering theory. It is most commonly associated with the concept of **crossing symmetry**, which describes the relationship between different scattering processes. When particles collide, they can interact and scatter in various ways. The "crossing" concept allows physicists to relate different scattering processes to each other through transformations.
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