2003/06/26 by Stefano Profumo · 2 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #astro-ph #hep-ph #hep-th
paper · pdf · doi:10.1088/1126-6708/2003/06/052
published as JHEP0306:052,2003 · 14 pages, 5 figures, JHEP style. Version accepted for publication in JHEP
arxiv created 2003/06/26 · openalex publication_date 2003/06/26 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/29
We investigate SU(5) and SO(10) GUTs with vanishing scalar masses and trilinear scalar couplings at a scale higher than the unification scale. The parameter space of the models, further constrained by b-τYukawa coupling unification, consists of a common gaugino mass and of tanβ. We analyze the low energy phenomenology, finding that A-pole annihilations of neutralinos and/or coannihilations with the lightest stau drive the relic density within the cosmologically preferred range in a significant region of the allowed parameter space. Implications for neutralino direct detection and for CERN LHC experiments are also discussed.