Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-11-24
Phys.Rev. D59 (1999) 125003
Physics
High Energy Physics
High Energy Physics - Phenomenology
24 pages, 3 figures
Scientific paper
10.1103/PhysRevD.59.125003
Recently we have proposed a simple hadronic axion model within gauge-mediated supersymmetry breaking. In this paper we discuss various cosmological consequences of the model in great detail. A particular attention is paid to a saxion, a scalar partner of an axion, which is produced as a coherent oscillation in the early universe. We show that our model is cosmologically viable, if the reheating temperature of inflation is sufficiently low. We also discuss the late decay of the saxion which gives a preferable power spectrum of the density fluctuation in the standard cold dark matter model when compared with the observation.
Asaka Takehiko
Yamaguchi Masahiro
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