Dark matter scenarios in a constrained model with Dirac gauginos

• Published in: The journal of high energy physics Vol. 2015; no. 10; pp. 1 - 30
• Main Authors: Goodsell, M.D., Krauss, M.E., Müller, T., Porod, W., Staub, F.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.10.2015
• Subjects: Classical and Quantum Gravitation; Constraints; Dark matter; Elementary Particles; Fermions; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Quantum Physics; Regular Article - Theoretical Physics; Relativity Theory; Scalars; Searching; Splitting; Standard model (particle physics); String Theory; Supersymmetry; Supersymmetry Phenomenology
• ISSN: 1029-8479; 1029-8479
• DOI: 10.1007/JHEP10(2015)132

A bstract We perform the first analysis of Dark Matter scenarios in a constrained model with Dirac Gauginos. The model under investigation is the Constrained Minimal Dirac Gaugino Supersymmetric Standard model (CMDGSSM) where the Majorana mass terms of gauginos vanish. However, R -symmetry is broken in the Higgs sector by an explicit and/or effective B μ -term. This causes a mass splitting between Dirac states in the fermion sector and the neutralinos, which provide the dark matter candidate, become pseudo-Dirac states. We discuss two scenarios: the universal case with all scalar masses unified at the GUT scale, and the case with non-universal Higgs soft-terms. We identify different regions in the parameter space which fulfill all constraints from the dark matter abundance, the limits from SUSY and direct dark matter searches and the Higgs mass. Most of these points can be tested with the next generation of direct dark matter detection experiments.