2017/04/30 by Delle Rose, Luigi, L. Delle Rose, A. E. Faraggi +9
Physics and Astronomy · #Black Holes and Theoretical Physics #Collider #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark matter #Gauge (firearms) #Gauge boson #Gauge group #Gauge theory #Grand Unified Theory #Heterotic string theory #Mathematical physics #Minimal Supersymmetric Standard Model #Naturalness #Parameter space #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Scalar (mathematics) #Standard Model (mathematical formulation) #Statistics #String (physics) #Supersymmetry #Symmetry breaking #Theoretical physics #hep-ph #hep-th
paper · pdf · doi:10.1103/physrevd.96.055025
published as Phys. Rev. D 96, 055025 (2017) · 24 pages. 5 figures. Standard LaTex. Additional comments and clarifications. Published version
openalex created_date 2017/04/28 · openalex publication_date 2017/09/18 · arxiv created 2017/09/20 · arxiv updated 2017/09/27 · openalex updated_date 2026/08/05
The dark matter issue is among the most perplexing in contemporary physics. The problem is more enigmatic due to the wide range of possible solutions, ranging from the ultralight to the supermassive. String theory gives rise to plausible dark matter candidates due to the breaking of the non-Abelian grand unified theory (GUT) symmetries by Wilson lines. The physical spectrum then contains states that do not satisfy the quantization conditions of the unbroken GUT symmetry. Given that the Standard Model states are identified with broken GUT representations, and provided that any ensuing symmetry breakings are induced by components of GUT states, a remnant discrete symmetry remains that forbids the decay of the Wilsonian states. A class of such states are obtained in a heterotic-string-derived Z^\ensuremath' model. The model exploits the spinor-vector duality symmetry, observed in the fermionic Z2\ifmmode×\else\texttimes\fiZ2 heterotic-string orbifolds, to generate a Z^\ensuremath'\ensuremath∈E6 symmetry that may remain unbroken down to low energies. The E6 symmetry is broken at the string level with discrete Wilson lines. The Wilsonian dark matter candidates in the string-derived model are SO(10), and hence Standard Model, singlets and possess non-E6 U(1)_Z^\ensuremath' charges. Depending on the U(1)_Z^\ensuremath' breaking scale and the reheating temperature they give rise to different scenarios for the relic abundance, and are in accordance with the cosmological constraints.