Perturbative Prepotential and Monodromies in N=2 Heterotic Superstring

Details Perturbative Prepotential and Monodromies in N=2 Heterotic Superstring Perturbative Prepotential and Monodromies in N=2 Heterotic Superstring

1995-04-07

arxiv.org/abs/hep-th/9504034v2

Nucl.Phys. B447 (1995) 35-61

Physics

High Energy Physics

High Energy Physics - Theory

39 pages, LaTeX, no figures; section 6 expanded to include explicit construction of the monodromy group in a (4,0) orbifold ex

Scientific paper

10.1016/0550-3213(95)00240-S

We discuss the prepotential describing the effective field theory of N=2 heterotic superstring models. At the one loop-level the prepotential develops logarithmic singularities due to the appearance of charged massless states at particular surfaces in the moduli space of vector multiplets. These singularities modify the classical duality symmetry group which now becomes a representation of the fundamental group of the moduli space minus the singular surfaces. For the simplest two-moduli case, this fundamental group turns out to be a certain braid group and we determine the resulting full duality transformations of the prepotential, which are exact in perturbation theory.

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