CAVENDISH LABORATORY UA5 EXPERIMENT, CERN / DAVID PARKER / SCIENCE PHOTO LIBRARY CAVENDISH LABORATORY UA5 EXPERIMENT, CERN / DAVID PARKER / SCIENCE PHOTO LIBRARY
Computer-processed streamer chamber photograph of the tracks of subatomic particles produced in a proton-antiproton collision at a total energy of 900 GeV. The collision was recorded in the UA5 detector at CERN, the European particle physics laboratory outside Geneva. The proton & antiproton have come in from the sides of the picture & annihilated at centre into pure energy; this energy rematerialises in a spray of new particles, mostly pions. Recorded 1985.
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