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physical object > natural object > particle > boson > meson > pion > pi-
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pi- comparison table
Subject is a kind of has quantum behavior has number of quark is an instance of has spin has synonym has mass has decay product has definition has charge has lifetime is accelerated by
charged particleparticle       A particle with non-zero chargenon-zero electric or magnetic fields
pioncharge multipletBose-Einstein statistics2 -has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Pressπ-meson270 me An 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 
pi- Bose-Einstein statistics2charged particle-has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Pressπ-meson273 memuon, neutrino -1-has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Presselectric or magnetic fields

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