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 | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / PROF. G. PIRAGINO |
Taille de l’image : | 2803 px × 3679 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |