Universal moduli-dependent thresholds in Z(2)xZ(2) orbifolds

Details Universal moduli-dependent thresholds in Z(2)xZ(2) orbifolds Universal moduli-dependent thresholds in Z(2)xZ(2) orbifolds

1996-01-09

arxiv.org/abs/hep-th/9601037v3

Phys.Lett.B374:49-56,1996

Physics

High Energy Physics

High Energy Physics - Theory

12 pages, Latex, contains two figures, final version, typos corrected

Scientific paper

10.1016/0370-2693(96)00230-4

In the context of a recently proposed method for computing exactly string loop corrections regularized in the infra-red, we determine and calculate the universal moduli-dependent part of the threshold corrections to the gauge couplings for the symmetric $Z_2\times Z_2$ orbifold model. We show that these corrections decrease the unification scale of the underlying effective field theory. We also comment on the relation between this infra-red regularization scheme and other proposed methods.

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