: Astronomía: pionium

high-energy astrophysics > particle astrophysics > exotic atom > pionium

pionium

Pionium is a composite particle consisting of one π⁺ and one π⁻ meson. It can be created, for instance, by interaction of a proton beam accelerated by a particle accelerator and a target nucleus. Pionium has a short lifetime, predicted by chiral perturbation theory to be 2.89×10⁻¹⁵ s. It decays mainly into two π⁰ mesons, and to a smaller extent into two photons. (Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Pionium)

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