Isocurvature Fluctuations of the M-theory Axion in a Hybrid Inflation Model
Open Access
- 1 November 1998
- journal article
- Published by Oxford University Press (OUP) in Progress of Theoretical Physics
- Vol. 100 (5) , 1055-1062
- https://doi.org/10.1143/ptp.100.1055
Abstract
The M-theory, the strong-coupling heterotic string theory, presents various interesting new phenomenologies. The M-theory bulk axion is one of these. The decay constant in this context is estimated as Fa≃1016 GeV. Direct searches for the M-theory axion seem impossible because of the large decay constant. However, we point out that large isocurvature fluctuations of the M-theory axion are obtained in a hybrid inflation model, which will most likely be detectable in future satellite experiments on anisotropies of cosmic microwave background radiation.Keywords
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