Exponentially Small Couplings between Twisted Fields of Orbifold String Theories

Details Exponentially Small Couplings between Twisted Fields of Orbifold String Theories Exponentially Small Couplings between Twisted Fields of Orbifold String Theories

1997-06-04

arxiv.org/abs/hep-th/9706028v1

Int.J.Mod.Phys. A13 (1998) 3255-3274

Physics

High Energy Physics

High Energy Physics - Theory

21 pages, 4 figures

Scientific paper

10.1142/S0217751X98001633

We investigate the natural occurence of exponentially small couplings in effective field theories deduced from higher dimensional models. We calculate the coupling between twisted fields of the Z_3 Abelian orbifold compactification of the heterotic string. Due to the propagation of massive Kaluza-Klein modes between the fixed points of the orbifold, the massless twisted fields located at these singular points become weakly coupled. The resulting small couplings have an exponential dependence on the mass of the intermediate states and the distance between the fixed points.

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