Proton stability in TeV-scale GUTs

Details Proton stability in TeV-scale GUTs Proton stability in TeV-scale GUTs

2001-02-27

arxiv.org/abs/hep-ph/0102323v3

Phys.Lett. B514 (2001) 131-138

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, typos corrected, references and comments added, accepted in Phys. Lett. B

Scientific paper

10.1016/S0370-2693(01)00776-6

We discuss the proton decay problem in theories with low gravity and/or GUT scales. We pointed out that the gravity induced proton decay can be indeed suppressed up to a desired level, while the GUT origin of the proton instability is rather problematic. To solve this problem we suggest the GUT model where the proton is stable in all orders of perturbation theory. This can be simply achieved by the replication of quark-lepton families with ordinary quarks and leptons residing in different GUT representations and by an appropriate dimensional reduction. The model predicts extra mirror states which along with the GUT particles and the excitations of extra dimensions could be observable at high-energy colliders providing the unification scale is in the TeV range.

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