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Encyclopedia :
P :
PI :
PIO :
Pionium |
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PioniumPionium is an exotic atom consisting of a &pi+ and a π− meson. It is generally created by the interaction of a proton beam and a target nucleus in a particle accelerator.Currently, pionium is under investigation at CERN to measure its lifetime. The lifetime is predicted by chiral perturbation theory to be 2.89 × 10−15 seconds. The result of the experiment is a crucial test of low energy QCD predictions.
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