Antimatter annihilation

When antimatter such as an antiproton meets matter the result is the annihilation of the antiproton with one of the nucleons composing the nuclei of matter. The energy is released by the emission of secondary particles such as pions, or by the ejection of one or several fragments of the nucleus remnants. The annihilation "star" and the tracks left by the ejectiles can be observed by annihilating antiprotons in photographic films (emulsions). After development the annihilation center can be measured with precisions at the micrometer level. This is the method that AEgIS will use to determine how antihydrogen falls to the earth.

Below is a 3D picture of an antiproton annihilation in a photographic emulsion taken at CERN in 2012.


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Help us to find the tracks and the annihilation points!

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