On SO(32) heterotic - type I superstring duality in ten dimensions

Details On SO(32) heterotic - type I superstring duality in ten dimensions On SO(32) heterotic - type I superstring duality in ten dimensions

1995-10-24

arxiv.org/abs/hep-th/9510173v4

Phys.Lett.B367:84-90,1996

Physics

High Energy Physics

High Energy Physics - Theory

11 pages, harvmac. Several comments added, final version to appear in Physics Letters B

Scientific paper

10.1016/0370-2693(95)01452-7

We provide some additional evidence in favour of the strong - weak coupling duality between the SO(32) heterotic and type I superstring theories by comparing terms quartic in the gauge field strength in their low-energy effective actions. We argue that these terms should not receive higher-loop string corrections so that duality should relate the leading-order perturbative coefficients in the two theories. In particular, we demonstrate that the coefficient of the $F^4$-term in the one-loop (torus) part of the SO(32) heterotic string action is exactly the same as the coefficient of the $F^4$-term in the tree-level (disc) part of the type I action.

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