SO(10) SUSY GUTs with mainly axion cold dark matter: implications for cosmology and colliders

Journal Article · Mon Aug 30 00:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3489546· OSTI ID:21426561

Baer, Howard ^[1]

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1. Dept. of Physics and Astronomy, University of Oklahoma, Norman, OK, 73019 (United States)

Supersymmetric grand unified theories based on the gauge group SO(10) are highly motivated. In the simplest models, one expects t--b--{tau} Yukawa coupling unification, in addition to gauge, matter and Higgs unification. Yukawa unification only occurs with very special GUT scale boundary conditions, leading to a spectra with {approx} 10 TeV first and second generation scalars, TeV-scale third generation scalars, and light gauginos. The relic density of neutralino cold dark matter is calculated to be 10{sup 2}-10{sup 4} times higher than observation. If we extend the theory with the PQ solution to the strong CP problem, then instead a mixture of axions and axinos comprises the dark matter, with the measured abundance. Such a solution solves several cosmological problems. We predict a rather light gluino with m{sub g}-tilde{approx}300-500 GeV that should be visible in either Tevatron or forthcoming LHC run 1 data. We would also expect ultimately a positive result from relic axion search experiments.

• OSTI ID: 21426561
• Journal Information: AIP Conference Proceedings, Vol. 1274, Issue 1; Conference: AXIONS 2010: International conference on the cosmology, astrophysics and particle physics of the axion and the results of recent searches for this hypothetical particle, Gainesville, FL (United States), 15-18 Jan 2010; Other Information: DOI: 10.1063/1.3489546; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

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