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Encyclopedia > Exchange particle

In particle physics, the quantum field theory called the Standard Model describes the strong, weak and electromagnetic fundamental forces. In such theories, each type of interaction has a characteristic set of force carrier particles associated with quantum excitation of the force field related to that interaction.


The carrier particles either appear in intermediate stages or are produced during all particle processes involving that type of interaction. Forces between particles can be described in terms of static force fields and exchanges of force carrier particles between the affected particles.


The force carriers of the Standard Model are bosons, known as gauge bosons:

The name for the carrier particle of gravitational interactions is the graviton. The status of this particle is still tentative, because the theory is incomplete and there has been no good experimental evidence that they exist. Gravitons are not considered to be a part of the Standard Model.


In the Standard Model a fifth interaction type is needed to account for the masses of all particles, the hypothetical Higgs field carried by Higgs bosons.


  Results from FactBites:
 
Exchange Particles (1159 words)
Gluons are the exchange particles for the color force between quarks, analogous to the exchange of photons in the electromagnetic force between two charged particles.
The W and Z particles are the massive exchange particles which are involved in the nuclear weak interaction, the weak force between electrons and neutrinos.
The W and Z particles are called intermediate vector bosons and are the exchange particles for the weak interaction.
Apparatus for treating a fluid in an ion exchange process - Patent 5626750 (7466 words)
Reciprocating flow ion exchange systems are used in ion exchange processes for the removal and/or recovery of at least part of a component or components from a fluid by contacting the fluid with ion exchange particles.
Previously, the ion exchange particles could not be removed from the vessel without first having to physically disconnect the vessel from the ion exchange system and disassemble the top or bottom to gain access to the ion exchange bed.
By using fine mesh particles there is a reduction of hydrodynamic mixing at the fluid (being treated) and regenerant interface and a reduction in contamination due to the finite diffusion rates of constituents of one fluid coming from the ion exchange particle when the particle is contacted with the other fluid.
  More results at FactBites »


 

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