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Abstract:
Based on a simple adiabatic argument and by considering the heterotic string counterpart of certain symmetries of Type II superstrings such as (1) FL(-1)~{F_L} and orientation reversal, we construct orbifold candidates for dual pairs of heterotic and Type II string theories with N=2N=2 and N=1N=1 supersymmetry. We also analyze from a similar point of view the K3{\rm K3} fibrations that enter in recently proposed N=2N=2 candidates and use this structure together with certain orientation-reversing symmetries to construct N=1N=1 dual pairs. These pairs involve generalizations of Type I vacua which can be equivalent to E8×E8E_8\times E_8 heterotic strings, while standard Type I vacua are related to SO(32)SO(32).
  • string model: heterotic
  • duality: transformation
  • field theory: orbifold
  • talk