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arXiv · hep-ph/9803293

Isocurvature Fluctuations of the M-theory Axion in a Hybrid Inflation Model

Toshiyuki Kanazawa·M. Kawasaki·Naoshi Sugiyama·T. Yanagida
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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 $F_a\simeq 10^{16}$ 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.

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Toshiyuki Kanazawa, M. Kawasaki, Naoshi Sugiyama, T. Yanagida. 1998-10-15. Isocurvature Fluctuations of the M-theory Axion in a Hybrid Inflation Model. https://doi.org/10.1143/ptp.100.1055

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