Supersymmetry, Axions and Cosmology

Details Supersymmetry, Axions and Cosmology Supersymmetry, Axions and Cosmology

2002-10-17

arxiv.org/abs/hep-ph/0210256v2

Phys.Rev. D68 (2003) 075011

Physics

High Energy Physics

High Energy Physics - Phenomenology

27 pages, published version, some discussions clarified

Scientific paper

10.1103/PhysRevD.68.075011

Various authors have noted that in particular models, the upper bound on the axion decay constant may not hold. We point out that within supersymmetry, this is a generic issue. For large decay constants, the cosmological problems associated with the axion's scalar partner are far more severe than those of the axion. We survey a variety of models, both for the axion multiplet and for cosmology, and find that in many cases where the cosmological problems of the saxion are solved, the usual upper bound on the axion is significantly relaxed. We discuss, more generally, the cosmological issues raised by the pseudoscalar members of moduli multiplets, and find that they are potentially quite severe.

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