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meson comparison table
Subject is a kind of has spin has synonym has mass has definition has lifetime
kaonmeson0K meson Meson with non-zero strangeness quantum number. 
pioncharge multiplet-has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Pressπ-meson270 meAn unstable nuclear particle of mass intermediate between that of a proton and an electron. The pions are believed to be the particles exchanged by nucleons, resulting in the strong nuclear force; they play a role in the strong interactions analogous to that of the photons in electromagnetic interactions.-has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press

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