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X and Y bosons



X and Y Bosons
Composition: Elementary particle
Family: Boson
Group: Gauge boson
Status: Hypothetical
No. of types: 12
Mass: ≈ 1015 GeV/c2
Decay particle: X: two quarks or antiquark and antilepton
Electric charge: X:+4/3 e
Y: +1/3 e
Color charge: nonzero
Spin: 1

In particle physics, the X and Y bosons are hypothetical elementary particles analogous to the W and Z bosons, but corresponding to a new type of force, such as the forces predicted by grand unified theory.

Additional recommended knowledge

The properties of the bosons vary according to the grand unification theory in which they are predicted. In most such theories, the X and Y bosons couple quarks to leptons, allowing violation of the conservation of baryon number and thus proton decay.

An X boson would have the following decay modes:

  • X \rightarrow \bar q + \bar l
  • X \rightarrow q + q

Where q is a quark and l is a lepton. In these reactions, neither the lepton number nor the baryon number is conserved, but B−L is. Different branching ratios between the X boson and its antiparticle (as is the case with the K-meson) would explain baryogenesis.

See also

  • B−L
  • Grand unification theory
  • Proton decay
 
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "X_and_Y_bosons". A list of authors is available in Wikipedia.
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