2011/07/14 by Marcin Badziak, Marek Olechowski, Stefan Pokorski · 38 citations
Physics and Astronomy · #Annihilation #CMB cold spot #Cosmic microwave background #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark matter #Electroweak interaction #Higgs boson #Minimal Supersymmetric Standard Model #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Quantum mechanics #Scalar (mathematics) #Standard Model (mathematical formulation) #Superpartner #Supersymmetry #Symmetry breaking #Yukawa potential #hep-ph
paper · pdf · doi:10.1007/jhep08(2011)147
published in Journal of High Energy Physics 2011(8) (Springer Nature) · 23 pages, 5 figures
arxiv created 2011/07/14 · openalex publication_date 2011/08/01 · arxiv updated 2011/09/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We investigate supersymmetric SO(10) GUT model with μ < 0. The requirements of top-bottom-tau Yukawa unification, correct radiative electroweak symmetry breaking and agreement with the present experimental data may be met when the soft masses of scalars and gauginos are non-universal. We show how appropriate non-universalities can easily be obtained in the SO(10) GUT broken to the Standard Model. We discuss how values of BR(b → sγ) and (g − 2) μ simultaneously in a good agreement with the experimental data can be achieved in SO(10) model with μ < 0. In the region of the parameter space preferred by our analysis there are two main mechanisms leading to the LSP relic abundance consistent with the WMAP results. One is the co-annihilation with the stau and the second is the resonant annihilation via exchange of the Z boson or the light Higgs scalar. A very interesting feature of SO(10) models with negative μ is that they predict relatively light sparticle spectra. Even the heaviest superpartners may easily have masses below 1.5 TeV in contrast to multi-TeV particles typical for models with positive μ.