Axinos as Dark Matter Particles

Details Axinos as Dark Matter Particles Axinos as Dark Matter Particles

2009-02-04

arxiv.org/abs/0902.0769v1

New J. Phys. 11 (2009) 105003

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

15 pages, 2 figures, invited contribution to NJP Focus Issue on 'Dark Matter and Particle Physics'

Scientific paper

10.1088/1367-2630/11/10/105003

The identification of dark matter in our particle physics model is still a very open question. Here we will argue that axinos can be successful dark matter candidates in models with supersymmetry and the axion solution of the strong CP problem. Axinos can be the lightest supersymmetric particle (LSP), or can be heavier than the LSP. Axinos can be produced in the right abundance by thermal scatterings and if they are the LSP also by out of equilibrium decays of the lightest superpartner of SM fields (LSPSMs). On the other hand heavier (not LSP) axinos can generate a part of the neutralino LSP dark matter. Depending on the nature of the supersymmetric spectrum, and if R-parity is strictly conserved or slightly broken, very different signals of the LSP axino scenario can arise at colliders and in astrophysics.

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