Sunday 15 May 2011

The Elementary Particles

In particle physics, an elementary particle or fundamental particle is a particle believed not to have substructure; that is, it is believed not to be made up of smaller particles. If an elementary particle truly has no substructure, then it is one of the basic building blocks of the universe from which all other particles are made.
 The elementary particles can be divided into two;the bosons and the fermions.Particles which satisfy the Bose-Einstein law  are  called bosons,those which satisfy the Fermi-Dirac law are called  fermions. 


Elementary particles of the Standard Model include:
  • Six "flavors" of quarks: up, down, bottom, top, strange, and charm;
  • Six types of leptons: electron, electron neutrino, muon, muon neutrino, tau, tau neutrino;
  •  Bosons (force carriers): the graviton of gravity, the photon of electromagnetism, the  W and Z bosons of the weak force, and the eight gluons of the strong force.
Out of this leptons, and baryons which include protons and neutrons come under the fermions.
{For more info on the elementary particles and the standard model theory click here}

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