2008/10/10 by Manuel Drees, Ju Min Kim
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1088/1126-6708/2008/12/095
published as JHEP 0812:095,2008 · 17 figures
arxiv created 2008/10/10 · openalex publication_date 2008/12/22 · arxiv updated 2010/04/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We consider a supersymmetric Grand Unified Theory (GUT) based on the gauge group SO(10) suggested by Aulakh et al., which features two--step intermediate symmetry breaking, SO(10) → SU(4)C × SU(2)L × SU(2)R → SU(3)C × U(1)B-L × SU(2)L × SU(2)R → SU(3)C × SU(2)L × U(1)Y. \bf 45, 54, 126+126 dimensional representations of Higgs superfields are employed to achieve this symmetry breaking chain. We also introduce a second, very heavy, pair of Higgs doublets, which modifies the Yukawa couplings of matter fields relative to minimal SO(10) predictions. We analyze the differences in the low energy phenomenology compared to that of mSUGRA, assuming universal soft breaking scalar masses, gaugino masses and trilinear couplings at the GUT scale. We find that thermal neutralino Dark Matter remains viable in this scenario, although for small and moderate values of tanβ the allowed region is even more highly constrained than in mSUGRA, and depends strongly on the the light neutrino masses.