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arXiv · hep-th/9512189

Integration Measure and Spectral Flow in the Critical N=2 String

Olaf Lechtenfeld
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Abstract

I present the moduli space of the (2+2)-dimensional critical closed fermionic string with two world-sheet supersymmetries. The integration of fermionic and Maxwell moduli in the presence of punctures yields the string measure for n-point amplitudes at arbitrary genus and instanton number. Generalized picture-changing and spectral-flow operators emerge, connecting different instanton sectors. Tree and loop amplitudes are computed.

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Olaf Lechtenfeld. 1995-12-22. Integration Measure and Spectral Flow in the Critical N=2 String. https://doi.org/10.1016/0920-5632(96)00316-7

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