Flaxino dark matter and stau decay

Details Flaxino dark matter and stau decay Flaxino dark matter and stau decay

2008-01-28

arxiv.org/abs/0801.4108v2

JHEP0803:061,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 4 figures, to appear in JHEP

Scientific paper

10.1088/1126-6708/2008/03/061

If the spontaneous breaking of Peccei-Quinn symmetry comes from soft supersymmetry breaking, the fermionic partners of the symmetry-breaking fields have mass of order the gravitino mass, and are called flatinos. The lightest flatino, called here the flaxino, is a CDM candidate if it is the lightest supersymmetric particle. We here explore flaxino dark matter assuming that the lightest ordinary supersymmetric particle is the stau, with gravity-mediated supersymmetry breaking. The decay of the stau to the flaxino is fast enough not to spoil the standard predictions of Big Bang Nucleosynthesis, and its track and decay can be seen in future colliders.

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