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hyperon
subject			fact

hyperon	has lifetime 10-8 to 10-10 seconds
	has spin 1/2 or 3/2
	has definition Baryons heavier than the neutron (this term is seldom used today). They have non-zero strangeness. Free hyperons are unstable and decay into end products, one of which is a proton.
	is a kind of baryon
	is a kind of radioactive particle
baryon	has number of quarks 3
radioactive particle	has desintegration energy the total energy produced when the particle decays
	has decay products the products produced immediately after decay
fermion	has quantum behavior Fermi-Dirac statistics
	obeys exclusion principle
particle	obeys uncertainty principle
	has frequency inversely proportional to the wavelength
	has wavelength inversely proportional to its momentum
	has charge
	has mass
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 hyperon :

• delta (2 facts) - Short-lived baryon.
• lambda (2 facts) - Heavy short-lived baryon.
• omega (4 facts) - Heavy short-lived baryon., The ratio of the average density of mass in the universe to the critical mass density, the latter being the density of mass needed to eventually halt the outward expansion of the universe. In an open universe, omega is always less than 1; in a closed universe, it is always greater than 1; in a flat universe it is always exactly equal to 1. Unless omega is exactly equal to 1, it changes in time, constantly decreasing in an open universe and constantly increasing in a closed universe. Omega has been measured to be about 0.1, although such measurements are difficult and uncertain. (See critical mass density; closed universe; flat universe; open universe.)
• sigma (4 facts) - Short-lived baryon., Short-lived baryon.

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