Fundamental physics research has a new particle accelerator called HERA, at the DESY laboratory in Hamburg. Unlike other particle accelerators, it is designed to collide head-on high-energy beams of different types of particles - in this case, electrons and protons. Electrons, which behave like points in space with no size, are the ideal tools for probing particles like protons, which are made up of smaller quarks. it is likely that HERA will allow the structures of the proton to be revealed in a detail that has not been possible before.
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