ar X iv : h ep - t h / 97 07 19 5 v 1 2 3 Ju l 1 99 7 LMU - TPW - 97 / 19 The string scale and the Planck scale Rainer
نویسنده
چکیده
A particle spectrum below the string scale in accordance with predictions from heterotic string theory yields a Planck mass mP l = (8πGN ) −1/2 which exceeds the string scale by a factor ≃ 61.9. A Planck mass mP l = 2.43× 1018 GeV then corresponds to a string scale ms = 3.9 × 1016 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. PACS numbers: 11.25.-w, 04.60.-m Typeset using REVTEX
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