High Quality Content by WIKIPEDIA articles! 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 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. Where u is an up quark, d is a down quark, ?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.

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