2005/06/15 by Alex Kehagias, Kehagias, Alex, N.D. Tracas +2 · 3 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/0506144
14 pages, 6 figs, references added
openalex publication_date 2005/06/15 · arxiv created 2005/06/27 · openalex created_date 2016/06/24 · arxiv updated 2016/09/06 · openalex updated_date 2026/07/28
We perform a general 1-loop analysis by adding extra matter to the SM content, as well as by allowing a non-standard U(1)Y normalization in order to achieve unification. We find numerous solutions with U(1)Y only charged extra matter and unification scale of the order of MU=1016 GeV, or with SU(2) charged extra matter with lower MU. We next identify the SM extra matter as originating from the breaking of SO(10) either through the Pati-Salam group SU(4)xSU(2)LxSU(2)R or the flipped SU(5). In both cases, unification can be achieved with a rather minimal extra content. Contrary to the one-step SU(5) unification, in the two-step SO(10) unification we are discussing, coulored extra matter is not necessary. Finally, we discuss a split-supersymmetry like case, where extra matter is added to the split supersymmetric spectrum in order to attain 1-loop unification.