Day and night, weekends, weekdays, and holidays, physicists from around the world take shifts in BaBar's Interaction Region 2 control room. The BaBar detector records the products of the positron-electron collisions generated by the PEP-II rings. The two particle beams are carefully tuned to energies that, when combined, produce particles made of a bottom quark and its antiquark, or B-mesons.
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