X and Y bosons Information & X and Y bosons Links at HealthHaven.com

	X and Y Bosons
Composition:	Elementary particle
Statistical behavior:	Boson
Group:	Gauge boson
Status:	Hypothetical
Types:	12
Mass:	≈ 1015GeV/c2
Decays into:	X: two quarks or antiquark and charged antilepton; Y: two quarks or antiquark and charged antilepton or antiquark and antineutrino
Electric charge:	X:+4⁄3 e; Y: +1⁄3 e
Color charge:	nonzero
Spin:	1
Weak isospin projection:	X:+1⁄2; Y: −1⁄2
Weak hypercharge:	5⁄3
B − L:	2⁄3

In particle physics, the X and Y bosons (or sometimes collectively called just X bosons^[1]) are hypothetical elementary particles analogous to the W and Z bosons, but corresponding to a new type of force predicted by the Georgi–Glashow model, a grand unified theory.

[edit] Details

The X and Y bosons couple quarks to leptons, allowing violation of the conservation of baryon number and thus permitting proton decay.

An X boson would have the following decay modes:

X → u + u

X → e⁺ + d

A Y boson would have the following decay modes:

Y → e⁺ + u

Y → d + u

Y → ν_e + d

Where u is an up quark, d is a down quark, ν_e is an electron antineutrino and e⁺ is an positron. Similar decay products exist for the other quark-lepton generations

In these reactions, neither the lepton number (L) nor the baryon number (B) 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.

^ Ta-Pei Cheng; Ling-Fong Li (1983). Gauge Theory of Elementary Particle Physics. Oxford University Press. p. 437. ISBN 0198519613.

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