The string scale and the Planck scale

Details The string scale and the Planck scale The string scale and the Planck scale

1997-07-23

arxiv.org/abs/hep-th/9707195v1

Physics

High Energy Physics

High Energy Physics - Theory

6 pages, REVTeX (preprint style)

Scientific paper

A particle spectrum below the string scale in accordance with predictions from heterotic string theory yields a Planck mass $m_{Pl}=(8\pi G_N)^{-1/2}$ which exceeds the string scale by a factor $\simeq 61.9$. A Planck mass $m_{Pl}=2.43\times 10^{18}$ GeV then corresponds to a string scale $m_s=3.9\times 10^{16}$ GeV. Such a low value for the string scale in turn implies that the relative strength of graviton and vector exchange in the string/M-theory phase exceeds the corresponding ratio in the low energy field theory.

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