On The Warped Heterotic Axion

Details On The Warped Heterotic Axion On The Warped Heterotic Axion

2008-03-26

arxiv.org/abs/0803.3828v2

JHEP0806:056,2008

Physics

High Energy Physics

High Energy Physics - Theory

Latex, 31 pages, no figures; v2: some typos corrected, a short discussion on standard model embedding, and references added. F

Scientific paper

10.1088/1126-6708/2008/06/056

We study the axion in a warped heterotic background. It is shown that the axion decay constant, f_a, is sensitive to the warped mass scale of the throat. As an explicit model, we construct a novel AdS-like geometry in heterotic string theory. We demonstrate that in this background f_a is given by the mass scale of the longest throat in the compactification. The question of obtaining f_a within the required bound 10^9--10^12 GeV is reduced to the construction of a throat inside the heterotic string theory compactification with warped mass scale in the above range. This provides a natural mechanism for realising the axion in heterotic string theory.

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