A dark matter solution from the supersymmetric axion model

Details A dark matter solution from the supersymmetric axion model A dark matter solution from the supersymmetric axion model

1996-04-02

arxiv.org/abs/hep-ph/9604222v1

Phys.Rev.Lett. 77 (1996) 591-594

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, no figure, REVTEX 3.0

Scientific paper

10.1103/PhysRevLett.77.591

We study the effect of the late decaying saxino (the scalar superpartner of the axion) and find out that there is a possible dark matter solution from a class of supersymmetric extensions of the invisible axion model. In this class of models, the saxino which decays into two axions acts as the late decaying particle which reconciles the cold dark matter model with high values of the Hubble constant. Recent observations of the Hubble constant are converging to $H_0=70\!-\!80\,{\rm km}\,{\rm sec}^{-1}\,{\rm Mpc}^{-1}$, which would be inconsistent with the standard mixed dark matter model. This class of models provides a plausible framework for the alternative cold dark matter plus late decaying particle model, with the interesting possibility that both cold dark matter and the extra radiation consist of axion.

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