Phenomenological and cosmological aspects of a minimal GUT scenario

2005/12/05 by Ilja Doršner, Ilja Dorsner, P. Perez +3 · 4 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Neutrino Physics Research #Particle physics theoretical and experimental studies #astro-ph #hep-ph

paper · pdf · doi:10.1016/j.nuclphysb.2006.05.006

published as Nucl.Phys.B747:312-327,2006 · 20 pages, 3 eps figures

arxiv created 2005/12/05 · openalex publication_date 2006/06/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Several phenomenological and cosmological aspects of a minimal extension of the Georgi-Glashow model, where the Higgs sector is composed by 5_H, 15_H, and 24_H, are studied. It is shown that the constraints coming from the unification of gauge interactions up to two-loop level predict light scalar leptoquarks. In this GUT scenario, the upper bound on the total proton decay lifetime is tau_p < 1.4 x 10³6 years. The possibility to explain the matter-antimatter asymmetry in the universe through the decays of SU(2)_L scalar triplets is also studied. We find that a successful triplet seesaw leptogenesis implies an upper bound on the scalar leptoquark mass, M_Phib < 10^6-7 GeV. We conclude that this GUT scenario can be tested at the next generation of proton decay experiments and future colliders through the production of scalar leptoquarks.

Citations

• 2/3 Splitting in SUSY GUT -- Higgs as Goldstone Boson
• Search for Higgs, Leptoquarks, and Exotics at Tevatron
• A new lepton-quark mass relation in a unified theory
• Unity of All Elementary-Particle Forces
• Search for leptoquarks in electron–photon scattering at up to 209 GeV at LEP
• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• On anomalous electroweak baryon-number non-conservation in the early universe

Cited by

• Fermion masses and the UV cutoff of the minimal realisticSU(5)model
• Large underground, liquid based detectors for astro-particle physics in Europe: scientific case and prospects
• Violation of the Appelquist-Carazzone decoupling in a nonsupersymmetric grand unified theory
• Proton stability in grand unified theories, in strings and in branes