Streamer chamber photo of a pion-muon-electron (pi-mu-e) decay chain resulting from an antiproton annihilation. The antiproton enters from the bottom

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Streamer chamber photo of a pion-muon-electron (pi-mu-e) decay chain resulting from an antiproton annihilation. The antiproton enters from the bottom of the picture & annihilates with a proton in neon gas filling the chamber; their energy materialises as 3 nuclear fragments (thick tracks) & several pions (less dense tracks). One positive pion curls tightly to the right in the chamber's magnetic field before decaying to a muon; the muon forms the spiral at top before decaying to a positron (or anti-electron). At each decay the tracks change direction sharply, indicating emission of an unseen neutrino. Photo taken at Experiment PS 179 at CERN, Geneva.

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Size: 2803px × 3679px
Photo credit: © PROF. G. PIRAGINO/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: action, antiproton, black, black--white, chamber, decay, electron, energy, event, force, high-energy, image, images, impact, magnified, microscopic, monochrome, motion, move, movement, moving, muon, odyssey, particle, photo, photos, physics, pi-mu-, pion, positron, streamer, subatomic, subjects, track, white