Streamer chamber photo of pi-mu-e decay

Streamer chamber photo of pi-mu-e decay

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Caption: False-colour 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 positive & negative 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 & then decays in turn to an electron. At each decay the tracks change direction sharply, indic- ating simultaneous emission of an unseen neutrino. Photo taken at Experiment PS 179 at CERN, Geneva.

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Keywords: cern, electron, experiment ps 179, image, images, impact event force energy, magnified image, microscopic photos, motion action, move movement moving, muon, particle physics, photo, pi-mu-e, pion, spiral, streamer chamber, subjects

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