Since the X and Y boson mediate the grand unified force, they would have unusual high mass, which requires more energy to create than the reach of any current particle collider experiment.
A Y boson would have the following three decay modes:[1]: 442 where u is an up antiquark and νe is an electron antineutrino.
The first product of each decay has left-handed chirality and the second has right-handed chirality, which always produces one fermion with the same handedness that would be produced by the decay of a W boson, and one fermion with contrary handedness ("wrong handed").
Different branching ratios between the X boson and its antiparticle (as is the case with the K-meson) would explain baryogenesis.
For instance, if an X+ / X− pair is created out of energy, and they follow the two branches described above: re-grouping the result ( u + u + d ) + e− = p + e− shows it to be a hydrogen atom.