Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1992-03-25
Phys.Lett.B283:209-212,1992
Physics
High Energy Physics
High Energy Physics - Theory
9 pages
Scientific paper
10.1016/0370-2693(92)90009-S
We study moduli dependent threshold corrections to gravitational couplings in the case of the heterotic string compactified on a symmetric orbifold, for untwisted moduli, extending previous analysis on gauge couplings. Like in the gauge case, the contribution comes entirely from the spacetime $N=2$ sector. As a byproduct, this calculation provides a simple derivation of the trace anomaly coefficients for the different fields coupled to gravity.
Antoniadis Ignatios
Gava Edi
Narain Kumar S.
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