Pionic atoms are exotic systems in which a negatively charged pion is bound in an atom-like orbital. |
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Sensitive detectors can track the alpha particles produced and capture the two photons that are produced when the pion subsequently decays. |
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The wave functions of both the deuteron and the alpha particle are invariant under the interchange of up and down quarks but recall that the pion wave function is not. |
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Some of them, just as in the case of the pion and the muon, are lighter than the proton, but many are more massive. |
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A neutral pion consists of a down quark and a down antiquark. |
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The possibility of PION should be considered in the differential diagnosis of retrobulbar neuropathies. |
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He has succeeded, thanks to the inclusion of works from Nusrat Fateh Ali Khan, John Clifford White, The Grid, Shu-de, Dave Clayton and Renaud Pion, and Peter Gabriel. |
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