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physical object > natural object > particle > boson > meson > pion

pion (π-meson)
subject			fact

pion	has synonym π-meson
	has mass 270 me
	has definition 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.
	is a kind of meson
	is a kind of charge multiplet
meson	has spin 0
	has number of quarks 2
charge multiplet	has lifetime -has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press
	has spin -has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press
boson	has quantum behavior Bose-Einstein statistics
particle	obeys uncertainty principle
	has frequency inversely proportional to the wavelength
	has wavelength inversely proportional to its momentum
	has charge
physical object	has location or center of gravity
	has angular momentum
	has velocity
	has momentum
	has temperature
	has volume
	has extent
	has material

Kinds of pion :

• pi+ (5 facts)
• pi- (5 facts)
• pi0 (4 facts)

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