Fermion dark matter from SO(10) GUTs

• DOI: 10.1103/physrevd.93.013012
• Publication Date: 2016-01-25T08:10:09Z
• Authors: Carolina Arbeláez; Robinson Longas; Diego Restrepo; Oscar Zapata

We construct and analyze nonsupersymmetric SO(10) standard model extensions which explain dark matter (DM) through the fermionic Higgs portal. In these SO(10)-based models the DM particle is naturally stable since a ${Z}_{2}$ discrete symmetry, the matter parity, is left at the end of the symmetry breaking chain to the standard model. Potentially realistic models contain the $\mathbf{10}$ and $\mathbf{45}$ fermionic representations from which a neutralino-like mass matrix with arbitrary mixings can be obtained. Two different SO(10) breaking chains will be analyzed in light of gauge coupling unification: the standard path $\mathrm{SU}(5)\ifmmode\times\else\texttimes\fi{}U(1{)}_{X}$ and the left-right symmetry intermediate chain. The former opens the possibility of a split supersymmetric-like spectrum with an additional (inert) scalar doublet, while the later requires additional exotic scalar representations associated to the breaking of the left-right symmetry.