First 'neutral current' observation

Bildnummer 11518213
First 'neutral current' observation
First observation of a 'neutral current' event. In this photo from the Gargamelle bubble chamber at CERN,a beam of neutrinos enters from bottom. Being neutral,the neutrinos leave no tracks,but at bottom left one sets in motion an electron,which heads up the picture,curling & fragmenting as it radiates photons. (The track curving across the top of the photo is not part of this event). This neutrino-electron interaction can only be a 'neutral current' event,due to the weak nuclear force & exchange of a force-carrying neutral Z particle. In 1972-3,Gargamelle physicists found this & 165 other examples of this interaction,which was predicted by the 'electroweak' theory
Lizenzart: Lizenzpflichtig
Credit: Science Photo Library / Cern
Bildgröße: 3189 px × 2162 px
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  • Editorial use only. This image may not be used to state or imply endorsement by CERN of any product, activity or service

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