Streamer Chamber Photo Of Pi-mu-e Decay
by Prof. G Piragino
Title
Streamer Chamber Photo Of Pi-mu-e Decay
Artist
Prof. G Piragino
Medium
Photograph - Photograph
Description
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.
Uploaded
May 14th, 2013
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