N=2 String Loops and Spectral Flow

Details N=2 String Loops and Spectral Flow N=2 String Loops and Spectral Flow

1995-10-02

arxiv.org/abs/hep-th/9510005v1

Physics

High Energy Physics

High Energy Physics - Theory

7 pages, Talk given at the International Workshop on Strings, Gravity and Related Topics, 29--30 June 1995, ICTP, Trieste, Ita

Scientific paper

Based on our previous studies of the BRST cohomology of the critical N=2 strings, we construct the loop measure and make explicit the role of the spectral flow at arbitrary genus and Chern class, in a holomorphic field basis. The spectral flow operator attributes to the existence of the hidden `small' N=4 superconformal symmetry which is non-linearly realized. We also discuss the symmetry properties of N=2 string amplitudes on locally-flat backgrounds.

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