Wikipedia:Picture of the day/September 24, 2005
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Particle physics is a branch of physics that studies the elementary constituents of matter and radiation, and the interactions between them. In the experiment illustrated here, particles erupt from the collision point of two relativistic (100 GeV) gold ions in the STAR detector of the Relativistic Heavy Ion Collider. Electrically charged particles are discernible by the curves they trace in the detector's magnetic field. Illustration credit: RHIC |