Are Isocurvature Fluctuations of the M-theory Axion Observable?

Details Are Isocurvature Fluctuations of the M-theory Axion Observable? Are Isocurvature Fluctuations of the M-theory Axion Observable?

1997-03-07

arxiv.org/abs/hep-ph/9703261v1

Prog.Theor.Phys. 97 (1997) 809-812

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages (LaTeX2e file, no figure)

Scientific paper

10.1143/PTP.97.809

Banks and Dine have recently shown that the M theory naturally accommodates the Peccei-Quinn axion. Since the decay constant $F_a$ of the axion is large as $F_a \simeq 10^{15}-10^{16}$GeV, the halo axion is hardly detected in coming axion-search experiments. However, we show that isocurvature fluctuations of the M-theory axion produced at the inflationary epoch are most likely detectable in future satellite experiments on anisotropies of the cosmic microwave background radiation.

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