X and Y bosons
| Composition | Elementary particle |
|---|---|
| Statistics | Bosonic |
| Status | Hypothetical |
| Types | 12 |
| Mass | ≈ 1015GeV/c2 |
| Decays into | X: two quarks, or one antiquark and one charged antilepton Y: two quarks, or one antiquark and one charged antilepton, or one antiquark and one antineutrino |
| Electric charge | X: +4/3 e Y: +1/3 e |
| Color charge | triplet or antitriplet |
| Spin | 1 |
| Spin states | 3 |
| 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 (sometimes collectively called "X bosons") 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.
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:
where the two decay products in each process have opposite chirality,
u
is an up quark,
d
is a down antiquark and
e+
is a positron.
A Y boson would have the following decay modes:
where the first decay product in each process has left-handed chirality and the second has right-handed chirality and
ν
e is an electron antineutrino.
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Wikipedia