Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2001-06-18
Nucl.Phys.B620:237-258,2002
Physics
High Energy Physics
High Energy Physics - Theory
27 pages, latex, replaced version with additional refs
Scientific paper
10.1016/S0550-3213(01)00533-8
In this paper we consider heterotic compactifications on K3 x T2 as well as type II compactifications on K3-fibred Calabi-Yau spaces with certain fluxes for the gauge and RR field strengths F and H turned on. By providing an identification of corresponding fluxes we show that the well-known N=2 heterotic/type II string-string duality still holds for a subset of all possible fluxes, namely those which arise from six-dimensional gauge fields with internal magnetic flux on the common two-sphere P1, which is the base space of the type II K3-fibration. On the other hand, F- and H-fluxes without P1-support, such as heterotic F-fluxes on the torus T2 or type II H-fluxes on cycles of the K3-fibre cannot be matched in any simple way, which is a challenge for heterotic/type II string-string duality. Our analysis is based on the comparison of terms in the effective low-energy heterotic and type II actions which are induced by the fluxes, such as the Green-Schwarz couplings related to flux-induced U(1) anomalies, the effective superpotential and the Fayet-Iliopoulos scalar potential.
Curio Gottfried
Klemm Albrecht
Kors Boris
Lust Dieter
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