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Home > All Images > 1985 > March > 14 Mar 1985

Images Dated 14th March 1985

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W particle decay in Ua1 detector at CERN Featured 14 Mar 1985 Print

W particle decay in Ua1 detector at CERN

W particle decay. Computer graphic display of an event from the UA1 detector at CERN, the European particle physics laboratory outside Geneva, show- ing the decay of a W particle into an electron (blue track) & a neutrino (reconstructed blue track going upwards & ending in arrow), with other particle tracks in yellow & red. The W, which lives too briefly to be visible, was created in a high-energy proton-antiproton collision in CERN's Super-Proton-Synchrotron collider. A gauge boson & one of the carriers of the weak force, the W's 1983 discovery at CERN helped confirm the "electr- oweak" theory unifying the electromagnetic & weak forces. The UA1 detector is outlined in red. (Run 6069, Event 228)

© DAVID PARKER/SCIENCE PHOTO LIBRARY