2001/05/18 by Ferruccio Feruglio, Feruglio, Ferruccio
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/0105191
LaTex, 4 pages, talk given at the Cairo International Conference on High Energy Physics, Cairo, Egypt, 9-14 January 2001 and at the XXXth International Conference on High Energy Physics (ICHEP2000), Osaka, July 27-August 2, 2000
arxiv created 2001/05/18 · openalex publication_date 2001/05/18 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
A non-minimal, semi-realistic version of supersymmetric SU(5) grand unified theory is discussed. The solution of the doublet-triplet splitting problem leads to a better agreement between the predicted and observed values of the low-energy strong coupling constant and to a prolongation of the proton lifetime. A U(1) flavor symmetry allows to accommodate a realistic mass spectrum in the charged and in the neutral fermion sectors and protects doublet-triplet splitting and proton decay from dangerous radiative corrections or non-renormalizable operators.